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Surname Registry
last updated 16 November 2016
R to Z
| Surname | Ireland Location | Where Emigrated | Timeline | Contact |
| Raeburn (all sp) | Co Monaghan & Cavan | Canada | Abt 1840 | |
| Rafferty | Carrickmore, Co Tyrone | Co Durham, ENG | 1850-1910 | |
| Rafferty | Unknown | England | Bef. 1841 | |
| Rafferty | Unknown | Paisley, Scotland | Bef 1851 | |
| Raftery, Rafferty | Galway | USA | 1850s | |
| Rainsford | Murroe, Co Limerick | children to USA | 1848 | |
| Raleigh | Lismore | Alexandra LA | ca 1844-8 | |
| Rahill | Cavan | OH, KY | 1850 | |
| Ralph | Enniscorthy, Co Wexford | Crawford Co. OH | 1847-1900s | |
| Ramsey | Gorey Townld, Co Tyrone | Pickering, ONT, CAN | 1850 | |
| Ramsay/Ramsey | Ireland/Scotland? | Halton Co,ONT,CAN | ca1800 | |
| Ranson | Lisburn | Ontario, Canada | 1865 | |
| Ranson | St Field, Co Down | Glasgow, Scotland>Brisbane, AU | 1882 | |
| Ready | Tipperary | New Brunswick CAN | ca 1830 | |
| Ready | Liscannor, Co Clare | Elmira, NY | 1848-1925 | |
| Ready/Reedy | Ballingarry, Co Tipperary | Did not emig | 1840s | |
| Reardon | Co Kerry | Binghamton, Broome, NY | 1890s | |
| Reardon | Cappamore ?, Co Limerick (any) | Did not emig | Any | |
| Reardon,Riordan all sp | Inchigeelagh Parish, NW Cork | Brockton, MA | Late 1800s | |
| Reavis | not given | not given | not given | |
| Reddington | not given | RI > NYC | 1848-1850 | |
| Reddy | Kilkenny | New York, USA | 1912 | |
| Redmond | Sutton | Newfoundland | 1818 | |
| Redmond | Queens Co/Co Laois | NJ to IL | 1847-1850 | |
| Reed | Tyrone nr Londonberry | Jackson, IA; JoDaviess, IL | 1800s | |
| Regan | Co Kildare | CT, USA | 1864-1900 | |
| Regan | Co Cork | Buffalo NY | 1849 | |
| Regan | Dumanway area, Co Cork | not given | early 1800s | |
| Regan | Skibberean, Co Cork | Warwick, Qld, Australia | 1865 | |
| Regan | Kiltimagh Co.Mayo | Ashton-in-Makerfield,LAN,ENG | 1887- 1939 | |
| Regan | Gort, Galway | TN, USA | 1850 | |
| Regan | Co Sligo or Roscommon area | Prince Edward Co, CAN | 1845-1849 | |
| Regan, Reagan | Cork, Bantry Bay area | PA, NY | 1870+ | |
| Reid | Cork | QC, CAN | ca 1820 | |
| Reid | Cork | Canada | 1903 | |
| Reid | Co Meath | Boston/Worcester, MA | 1892 | |
| Reid | Derry | New Zealand | 1790-1920 | |
| Reid | Garryduff. Antrim | New Zealand | 1924 | |
| Reilly | Kinawley, Co Fermanagh | USA,OZ,SCOT | 1870-1950 | |
| Reilly | Balbriggan, Co Dublin | Philadelphia, PA | 1840> | |
| Reilly | Ballyconnell , Co Cavan | Grafton, New South Wales, AU | 1865 | |
| Reilly | Kilnavara, Co Cavan | Brooklyn, NY | 1810-1880 | |
| Reilly/O'Reilly | Co Cavan | PA and/or other | 1840s | |
| Reilly/Riley | Longford | CAN?>NY | 1870-1890 | |
| Reynolds | Kinsale, Co Cork | did not emig | 1750-1850 | |
| Reynolds | Dublin | NSW, Australia | ca 1860 | |
| Riboldi | Limerick | UK | 1940s | |
| Rice | Galway | USA, Pittsburgh PA | 1868-80 | |
| Rice | Balriggan Louth | Birkenhead UK | 1820-1910 | |
| Richardson | Poss.Belfast | Quebec City,CAN | Bef.1832 | |
| Ridge | Clifden, Galway | Rankin, PA | 1855-1886 | |
| Ridgeway | Dublin | not given | 1855-present | |
| Riley | Co Cavan | Illinois | 1830s | |
| Ring | Dromore, Kilshannig, Cork | Ontario, CAN | 1846 | |
| Riordan | Kells & Cahirciveen, Kerry | Fitchburg, MA | 1886 | |
| Riordan | Unknown | NYC, NY | 1850-1852 | |
| Ritchie | Belfast, Manorhamilton | Ontario, CAN | 1800-1880 | |
| Roan/Roane/Rowan | Cloghan, Donegal | Glascow, Scotland; NY | 1870-1945 | John |
| Robinson | Dublin, Chapelizod | not given | 1842-present | |
| Robinson | Drumcree Par. Co Armagh | did not emigrate | 1806-1889 | |
| Robinson | Burt, Taughboyne & All Saints,Donegal | AU & Scotland | 1793-1900 | |
| Robinson | Ulster | Canada | 1800-1900 | |
| Robinson | Co Down | New Zealand | 1880> | |
| Roche | Cty Cork, poss Cty Limerick | Quebec CAN | 1800-1850 | |
| Roche | Wexford | NY | 1865 | |
| Roche | Glanworth Par.Co Cork | US, AU | 1775-1900 | |
| Rochford | Kilkenny | not given | 1850-Pres. | |
| Rochfort | Cork City, Co Cork | NSW Australia | 1815 | |
| Rodden | Co Leitrim | New Zealand | 1857-1923 | |
| Roddy | Co Donegal> Belfast | Cedar Rapids, IA | 1871 | |
| Roddy, Ruddy | Donegal | Muff aka Iskaheen | 1900 | |
| Rogers | Meath | Liverpool, NY, USA | 1830-40 | |
| Rogers | Unknown | Philadelphia, PA | 1822-1852 | |
| Rohan, Rowan, Ruan | New Castle Athenry, Tiaquin | Columbus, Franklin Co, OH | 1851 | |
| Rohan/Roughan,etc. | Derrymore & Cratloe, Co Clare | Chicago, IL, USA | 1830s | |
| Roland | Co Mayo | CAN | 1837-1907 | |
| Roland/Rowland | Mayo | CAN>USA | 1840-1907 | |
| Rolston/Rollston | Co Armagh | ONT, CAN | up to1846 | |
| Ronan/Ronayne | Carrickbeg, Co Waterford | MA | 1830-1907 | |
| Rooney | Dublin | Lancaster, Lancaster Co, PA | 1840s | |
| Rooney | Tuam, Co Galway | St Louis MO, New Orleans LA | 1831-1901 | |
| Rooney | Ireland | Liverpool, UK | 1800-1810 | |
| Rooney | Armagh | Queensland, AU | 1885 | |
| Rooney | Co Cork | USA (Ellis Island) | 1895-1896 | |
| Rooney | Knockfin, nr Westport, Co Mayo | Chicago area | 1885 | |
| Rooney | Offaly | United States | 1840-1860 | |
| Rooney (All Sp) | Leitrim & Down | Ontario, CAN | 1750-1850 | |
| Rooney/Rowney | Ireland | Preston, Lancshire, ENG | 1840-1846 | |
| Rose | not given | not given | 1776-1806 | |
| Rossiter | Wexford Town | stayed in Wexford | 1865 | |
| Rouine Marsh | Clare | Lowell MA, USA | 1882 | |
| Rowan | Wexford | not given | not given | |
| Royston | Ferbane, Co Offaly | USA | 1890 | |
| Ruby | Cork City | London, UK | 1835-1866 | |
| Ruddell | Lurgan, Monaghan, Armagh, NI | New Zealand | 1700-2009 | |
| Ruddock | Co Wexford,Wicklow& Carlow | USA, CAN, NZ, AU | 1700-1840 | |
| Ruddy | Armagh | UK | 1880 | |
| Ruddy | Westport, Co Mayo | NY>Iowa>MN&IL | 1842 | |
| Rusk | Antrim | SC, GA, Illinois | 1790s | |
| Russell | Broughshane, Co Antrim | Australia | mid 1850s | |
| Russell | Manorhamilton, Leitrim | Tasmania AU | 1836-1877 | |
| Russell | 20 BelgrainRd, Rathmines, Co Dublin | NYC, NY, USA | 1897-1918 | |
| Russell | Tullylish, Banbridge, Co Down | not given | 1800-1900 | |
| Russell | Cork, Limerick | Chicago, IL | 1750-1850 | |
| Rutherford | Antrim | Australia | 1864 | |
| Ruttledge | Mayo | New Zealand | 1860 | |
| Ryan | Ballhale, Kilkenny | Boston & Chicopee MA | 1849 | |
| Ryan | Piltown, Mullinavat, Co Kilkenny | New Orleans, MS, AR; USA | 1700s-1850s | |
| Ryan | Unknown | Brooklyn, NY | 1850-1900 | |
| Ryan | Kilcommon, Tipperary | Australia | 1860 | |
| Ryan | Tipperary | Fulham ENG > Brooklyn NY | 1860-70 | |
| Ryan | Unknown | Troy, NY? | <1852 | |
| Ryan | Bansha, Co Tipperary | Australia | 1850s | |
| Ryan | Tipperary | IL> Troy, NY | C.1848 | |
| Ryan | Borrisoleigh, Tipperary | Melbourne AU | 1848-55 | |
| Ryan | High St,Craig,Kilkenny | NY,USA | 1890s | |
| Ryan | Unknown | Hemmingford, QUE, CAN | 1830 | |
| Ryan | Dranagh, Co Carlow | Butte, MT | 1910 | |
| Ryan | Doon, Co Limerick | New York City | 1890-1908 | |
| Ryan | Co Armagh | ONT, CAN | 1848 | |
| Ryan | not given | Melbourne, Australia | 1840-1855 | |
| Ryder | Wicklow | Australia | 1850s | |
| Ryle | Carlow | Western AU, USA | 1897-1911 | |
| Sammon | Galway | IL, USA | 1900 | |
| Saunders | Dublin | not given | 1790-1850 | |
| Saunders | Co Kilkenny, Callan & Windgap RC par. | NOLA > Lafayette Co. WI | early 1800s | |
| Saundry | Foxborough, Co Leitrim | England | 1805-1866 | |
| Savage | Shangolden, Limerick | did not emig | 1800s | |
| Sayers | Strabane, Co Tyrone | Newbridge, Vic, AU | 1858 | |
| Scally | Westmeath | Allegany Co, MD | 1848-1852 | |
| Scanlan/Scanlon | Limerick | CAN, & ME,USA | 1850 | |
| Scanlon | Co Carlow | NJ,USA>Simcoe,ONT,CAN | 1812> | |
| Scanlon | Co Cork | New Brunswick, CAN | c 1835 | |
| Scannell | Co Cork? | NY | 1846-1913 | |
| Scarf | Bawnee & Ridge, Co Carlow | Ballarat,VIC,AU | 1835-1860 | |
| Schofield | Galway | Boston MA | 1900 | |
| Scriminger, Scrimmager | Craignageeragh, Ahoghill, Ballymena, Antrim | Petone, New Zealand | 1906-10 | |
| Scott | Louisburgh, Co Mayo | Clinton, MA | 1894 | |
| Scullan | 1800s | |||
| Scullion | Northern Ireland? | Philadelphia PA | did not emig | |
| Scully | Co Offaly | NY > WI > ND, USA | 1810-90 | |
| Scully | Co Tipperary | Ontario CAN | 1840 | |
| Scully | Co Kilkenny | TN | 1851 | |
| Scully | Connacht | QC, CAN | ca 1820 | |
| Searls | Bandon, Cork City | not given | 1700-1930 | |
| Seery | Co Meath | Lawrence, Essex Co, MA | 1805-1870 | |
| Semple | Castlebar, Mayo | NY, USA | 1878+ | |
| Sexsmith/Sixsmith | Kilkenny, Gurteen | ONT, CAN | 1825-1848 | |
| Seymour | Castletownarra, Tipperary | Sydney NSW AUS | 1850 | |
| Shanahan | Limerick | Buffalo NY | late 1840s-1850s | |
| Shanahan | Limerick, Co Limerick | NYC>Miss,USA | 1841-1887 | |
| Shanahan | Listowel, Kerry | Ennismore, Peterborough Co, ONT, CAN | 1825 | |
| Shannahan | Co Clare | Unknown | 1820-1880 | |
| Shannon | Down, Cork | not given | not given | |
| Shannon | Roscommon | not given | 1800s | |
| Sharkey | Dublin | OH, MI, USA | 1830-1880 | |
| Sharkey | Balbriggan, Co Dublin | Philadelphia,P A | 1840> | |
| Sharkey | Boyle, Roscommon | Kingston, NY | 1847 | |
| Sharkey | Mayo | Scotland > OH, USA | 1852-1900 | |
| Shaughnessy | Limerick | Australia, Oil City PA | late 1800s | |
| Shaughnessy | Nr Adare, Co Limerick | AU & USA | 1852-1858 | |
| Shaw | Kilkenny, Wexford | Leeds ON | 1786-1820 | |
| Shaw | Co Down | England | 1800 | |
| Shaw | Tullylish, Banbridge, Co Down | not given | 1800-1900 | |
| Shaw | unknown | New Brunswick, Canada | 1820-1825 | |
| Shaw | Newry, Co Armagh | Grey Co Ontario | 1850 | |
| Shea | Newmarket, Cork | Lawrence MA | 1880? | |
| Shea | Kerry | UK>Ohio, USA | 1700s-1870 | |
| Shea | Clashapuca nr Trallee, Kerry | Waterbury, CT | 1881 | |
| Shea | Unknown | W. Springfield, MA | 1800s | |
| Shea | Minard/Dingle | Proctor, Rutland, VT | 1840-1875 | |
| Shea/Shay | Limerick | Vermont via CAN | 1815-1900 | |
| Sheahen, Sheahan | Killarney, Kerry | London | 1840 - 1890 | |
| Sheehan/Sheehy | Dingle, Kerry | MA | 1850-1870 | |
| Sheehan | Kilmacow, Kilkenny | Merthyr Tydfil,Wales, Pittsburgh,PA | 1804+ | |
| Sheehan | Pilltown, Kilkenny | England | 1845 | |
| Sheehan | Castledrum?, Castlemaine, Kerry | London | 1860 | |
| Sheehy | Ballyally, Skibbereen, Co Cork | Boston MA | 1890s | |
| Sheehy | Tralee, Dingle | <1890 | ||
| Sheehy | Tipperary | USA & Australia | All | |
| Sheil | Roscommon | NJ | 1928 | |
| Sheil | Wexford-Carlow | n/a | 1850-1900 | |
| Shepherd | Co Antrim & Co Down | Ontario CAN | 1928-9 | |
| Sheppard | Co Tyrone | New Zealand, AU | 1856-1865 | |
| Sherlock | Westmeath | Australia | 1841 | |
| Sherlock | Tonroe, Fauleens, Co Mayo | Boston | 1880 | |
| Sherrin | Co Cork? | New Orleans LA | 1830-50 | |
| Sherrin | Co Cork? | New Orleans LA | 1830-1850 | |
| Sherwood | Oldcastle,Co Meath | not given | not given | |
| Shevlin/Shovlin all sp | Ardara, Donegal | Glasgow, Scotland & PA, USA | 1840-1890 | |
| Shields | N Ireland | MD>VA>Preble Co, OH | 1790-1800 | |
| Shields-Walker | Kilkeel, Co Down | Markdale, ONT | Bef.1860 | |
| Shiely,Shealy,Sheely | Co Clare | NY, MN | 1848-present | |
| Shine | Cork | Chicago | 1927 | |
| Shine | Limerick/Kerry | Kansas City | 1883-1885 | |
| Singleton | Co. Clare | England/New Zealand | 1650-1890 | |
| Sinnot | Wexford | England/Wales | 1781-1800 | |
| Sherwood | Limerick | Ontario, CAN | 1793 | |
| Short | Tyrone | Kingston, Ontario CAN | 1800-1900 | |
| Shuel, Shuell | Kerry | Essex Co, ONT, CAN | 1840s | |
| Silke/Silk | Co Galway | Portland, ME | 1848-1855 | |
| Simpson | Armagh | New Brunwick, CAN | c 1811 | |
| Simpson | Longford | England | 1830-1910 | |
| Skehill/Scahill | Gort Galway | Queensland, AU | 1856 | |
| Skelly | Galway | USA | 1894 | |
| Skiffington | possibly Antrim | Philadelphia, PA | 1823-1889 | |
| Skiffington | Donaghmore, Co Tyrone | Baltimore, MD, USA | 1815-1863 | |
| Slater/Sleator | Sligo | Canada | 1842 | |
| Slater/Sleator | Belfast, Co Armagh | not given | 1800-1900 | |
| Slattery | Bruff,Limerick &Knockbritt,Tipperary | not given | not given | |
| Sleator | Riverstown, Sligo | New Zealand | 1920s | |
| Sleator | Sligo | England> Belfast NI | 1920s | |
| Slevin/Slavin | Ballybofey, Donegal | did not emigrate | 1800s | |
| Sliney | Co Sligo | PA, USA | 1800-33 | |
| Sloey, Sloy | Ulster | Pittsburgh PA | 1870 on | |
| Slowey | Ulster | PA > Arkansas | 1868+ | |
| Smark | Scariff, Co Clare; Limerick | UK, Australia | 1800s | |
| Smart | Banbridge, Co Down | New Zealand | 1824-97 | |
| Smiley | Co Derry | NY | 1860-65 | |
| Smith | Ireland | Ontario CAN | early 1800s | |
| Smith | Lismore | Alexandra LA | ca 1844-8 | |
| Smith | Co Cavan | Australia | mid 1860s | |
| Smith | Skalkill, Co Monaghan | San Francisco CA | 1880s | |
| Smith | BlackwaterBr.,Cavan | Sydney, AU | 1838 | |
| Smith | Co Armagh | Dufferin,ONT, CAN | 1829-1879 | |
| Smith | Clonbrook Wood Co Galway | NY | 1860 | |
| Smith | Tullamore, King's Co | ONT, CAN | 1820 | |
| Smith,Smyth | Co Cavan or Dublin | Casltemaine,VIC,AU | 1850s | |
| Smith,Smyth | Brackloon, Swinford, Co Mayo | San Francisco/Berkely, Martinez | late 1800s | |
| Smullen | Kildare, Dublin | NY | 1838-46 | |
| Smyth/Smith | Co Tyrone | Wentworth Co, ONT | 1912 | |
| Smythe | Dublin | Cooktown, Qld. | 1870s | |
| Snodgrass | Tyrone | USA | 1740 | |
| Solan | Tullinahoo, Swinford, Co Mayo | Montana>NY | early1900s | |
| Solon | Mayo | Chicago | 1890 | |
| Spearman | Tipperary | Quebec>Ontario,CAN | 1820s | |
| Speers, Spears | Arboe, Co Tyrone | Ontario CAN | bef 1851 | |
| Spence | Co Leitrim | New York, NY; LaSalle Co, IL | 1849> | |
| Spillane, Spellman | Tipperary, Offaly | Stockport ENG, Somersworth NH, Fall River MA | 1800-1900 | |
| Spillane | Co Cork | Rochester, Monroe NY | 1840s-60s | |
| Spillane | Dromdiralough, Glen Flesk, Kerry | London | 1860 | |
| Spotten(on) | Derryroosk, Co Monaghan | Philadelphia, PA | 1848-49 | |
| Spratt | Offaly? Leitrim? Antrim? Wicklow? | Ottawa area, Ontario CAN | 1700-1826 | |
| Spratt | Dromore, Co Down | St. Catherines, Ontario CAN | 1907 | |
| Spring | Limerick | not given | early 1800s | |
| Spring | Kerry | Homer,Cortland Co,NY | 1800s | |
| Sproule | Kiltarnaght, Newport, Burrishoole Par, Co Mayo | Australia, Canada, SCOT, USA, UK | not given | |
| Sproule | Fermanagh, Cavan | Canada | 1770-2008 | |
| Stack | Bansha, Tipperary | NYC,NY,USA | 1890 | |
| Stafford | Wexford | New York City, San Francisco | 1846-95 | |
| Stanley | Co Roscommon | Ohio,Indiana USA | 1882 | |
| Stanton | Midleton Co Cork | Tasmania AU | 1840-1912 | |
| Stapleton | St Marys, Kilkenny Cty, Co Kilkenny | Kingston nr Dublin | 1853 | |
| Stark | Co Limerick | US, Canada, Australia, UK | 1709-present | |
| Sta(u)nton | Ballyhean, Mayo | Manchester NH, USA | 1864 | |
| Steele | Cairncastle, Antrim | New Zealand | 1878 | |
| Steen | Donegal | Derry | 1838-1849 | |
| Steen | Grogy-Brookeborough, Fermanagh | Australia | 1808-1889 | |
| Steep | Limerick | Ontario,CAN | 1797 | |
| Steep/e | Kilfinane, Co Limerick | Shepparton, Victoria AU | 1879> | |
| Stephens | unknown | England | 1850-60s | |
| Stephens | Isle of Man ? | Maryland Indenture | 1726 | |
| Stephens | Carrowbeg, Swinford, Mayo | New York City | 1926 | |
| Stephenson | Leitrim | not given | all | |
| Stevens | Connaught | Ontario CAN | ca 1840 | |
| Stevenson | Co Armagh | not sure | any | |
| Stewart | Co Clare | Moreton Bay,AU | 1862 | |
| Stewart | Ballycastle, Antrim | Not Given | Not Given | |
| Stewart | Donegal | Not Given | 1782-1798 | |
| Stewart/Stuart | Rusheen, (Riverstown) Drumcolumb, Sligo | not given | 1833 | |
| Stewart | Co Derry | Canada | 1840-60 | |
| Stewart | Co Tyrone | Buried in Tyrone | 1730-1802 | |
| Stock | Somerset | Victoria, Australia | 1852 onwards | |
| Storey | Cavan, Dublin | Brockville, ONT, CAN | 1826 | |
| Strafford | Dromina,Charleville,Co Cork | NYC, NY | 1891-1958 | |
| Strahan, Srahan | Clonever, Offaly | Waterbury CT | 1861 | |
| Stratton | Loughgall Parish, Co Armagh | Fall River, MA, USA | 1881 | |
| Stinson | Enniskillen | Quebec | 1830-1840 | |
| Stirke | Kinsale, Co Cork | did not emig | 1700-1900 | |
| Stuart | Antrim | NC, USA | 1790-1795 | |
| Stuffle | Clifden, Co Galway | not given | not given | |
| Suffern | not given | Melbourne, Australia | 1840-1855 | |
| Sugrue | Castlegregory, Co Kerry | NY > MA | 1895 | |
| Sullivan | Skibbereen | New Hampshire | early 1900s | |
| Sullivan | Cork | NY, MT | 1850-1950 | |
| Sullivan | Cork | Australia, NSW | 1800-1820 | |
| Sullivan | Cork | Nova Scotia | Abt. 1835 | |
| Sullivan | Unknown | Troy, Columbia co, NY | Bef 1850 | |
| Sullivan | Killorglin, Co Kerry | Hartford, CT | c 1883 | |
| Sullivan/O'Sullivan | Ballyagran, Co Limerick | NY | 1900 | |
| Sullivan | Skibbereen, Co Cork | Rockhampton,QLD, AU | 1870-1874 | |
| Sullivan | unknown | Canada; Indiana, USA | 1857 | |
| Sullivan | Co Cork | Rochester, Monroe, NY | 1870s | |
| Sullivan | Cork | Colton, NY | 1800s | |
| Sullivan | Co Cork | Newfoundland | early 1800s | |
| Sullivan | Clonbllogue, Clonsast, Offaly | Verona, NY | 1825 | |
| Swain | Portadown, Co Armagh | CT | 1834-1900 | Jean McFall |
| Swaine | Wexford | Unknown | 1830-Pres. | |
| Swan/n | Monaghan? Antrim? | South Carolina | 1788> | |
| Sweeney | Co. Galway, Gortavoher | did not emig | early 1800s | |
| Sweeney | Unknown | Salem Co NJ | 1848-1852 | |
| Sweeney | Donegal | did not emig | 1800-1900 | |
| Synott | Tipperary | Sydney, NSW, AU | 1860 | |
| Taaffe | Co Meath | Melbourne, AU | 1859 | |
| Taheny | Riverstown Co Sligo | USA, AU, and UK | 1800-1920 | |
| Talbot | Kinvarra | NSW, AU | 1862-1941 | |
| Talbot | Co Kerry | Eramosa, ONT, CAN | 1832 | |
| Tarpy | poss Mayo | IL, USA | mid 1800s | |
| Taylor | Leitrim | unknown | 1850s | |
| Taylor | Carrowbehy, Co Roscommon | America | 1880s | |
| Taylor | Donegal | New Brunswick, CAN | 1819 | |
| Taz/Tase (all sp) | Donegal | USA | not given | |
| Teaghan, Tagan | unknown | Boston | bef 1854 | |
| Tedford | unknown | Ontario, CAN | bef 1842 | |
| Teevan | Butlersbridge, Co Cavan | NY, PA | 1870 | |
| Temple | Cavan Upper, Donegal | Chicago, IL | 1820-1892 | |
| Tew | Meath | Ontario CAN | 1750-1870 | |
| Thirry | Donaghmoyne, Monaghan | Hartford CT > NY, NY | 1882 | |
| Thomas | unknown | Richmond VA; Baltimore MD | 1850-60 | |
| Thompson | Drumreagh, Co Down | not given | 1927-1800+ | |
| Thompson/Thomson | Antrim | Scotland | 1850s | |
| Thompson | Fermanagh | Ontario, Canada | 1800-1960 | |
| Thompson | Belfast | Toronto | 1947 | |
| Thornton | Co Galway | Ormskirk, Liverpool, Lancashire | 1825-30 | |
| Thayne, Thane | Clontuskert, Roscommon | Susquehanna Co, PA | 1838-9 | |
| Tiernan | Kildare | New South Wales, AU | 1834 | |
| Tierney | Co Clare | WI | 1847 | |
| Tighe | Killala, Co Mayo | Rawdon, QUE,CAN | 1824 | |
| Timlin | Crenone,Augagmullen,CoMonaghan | Philadelphia, PA | 1847-48 | |
| Timmons | Kildare | not given | 1830s | |
| Timmons | Meath | Liverpool, NY, USA | 1830-1840 | |
| Tinneny (all sp) | Any | S Africa, USA, AU | 1800-1900 | |
| Tobin | Mullinavat, Co Kilkenny | New Orleans, MS, AR; USA | 1820s-1850s | |
| Tobin | Bansha, Co Tipperary | Australia | 1850s | |
| Tobin | Silvermines, Co Tipperary | Baltimore/Catonsville, MD, Manhattan/Brooklyn, NY | 1861> | |
| Tobin | poss Kilkenny | Philadelphia PA | 1867 on | |
| Tobin | Tipperary | MA, NV | 1850-60 | |
| Tolan | Unknown | New York | 1851 | |
| Toland | Londonderry | Sydney, Australia | 1853 | |
| Toner | Cookstown, Co Tyrone | Ontario, CAN | early 1800s | |
| Toole | Unknown | NYC/Cedar Iowa | 1859 | |
| Tormey | N Ireland | Australia | Not given | |
| Toy/Toye | Londonderry | Ontario, Canada | 1840-1850 | |
| Tracy/Treacy/Tracey | nr Roscrea, Co Tipperary | Niagara Co, NY | 1860s | |
| Trainer | Louth | Melbourne, VIC, AU | 1818 | |
| Trainor | unknown | USA pos CAN > MI | 1800s | |
| Trapp | Killow, Co Longford | NY > NJ USA | 1880-1900 | |
| Treanor | Co Down | Canada; Dubuque IA | 1802-82 | |
| Trearty | Drumnaraw Donegal | did not emig | not given | |
| Tresham | Tuam, Mayo, Galway | did not emig | early 1800s | |
| Treston | Ballyhaunis, Mayo | MA/NV/Solano Co, CA | 1865-1885 | |
| Tristram | Kilkenny, Wexford | Lancashire, Australia | 19th cent | |
| Troy | Dublin | England | 1801-1825 | |
| Tunstead | Co Carlow | NJ,USA>Simcoe,ONT,CAN | 1782> | |
| Turkington | N Ireland | not given | 1880-1950 | |
| Turner | Kilshannig by Mallow, Co Cork | IA, NY | 1790-1854 | |
| Tuohy | Feakle/Coologoree, Clare | Sydney, Australia | 1864+ | |
| Turvey | Co Armagh-Co Dublin | New Brunswick | 1816 | |
| Tuttle | Co Armagh? | Baltimore,MD | 1850 | |
| Twaddle | Coleraine, Co Donegal | NY, PA, OH, IN, IL, TX | 1745-Pres. | |
| Twist, Twiss | Dublin | NJ | 1850-1900 | |
| Tyler | Carrowbehy, Co Roscommon | America | 1880s | |
| Tyrels | Cork | Chester Co, PA | 1849 | |
| Tyrill, Tyrell | Co Offaly | NY > WI > ND, USA | 1810-1920 | |
| Upton | Ireland | Ontario CAN | early 1800s | |
| Valentine | Belfast | Winnipeg, CAN | 1906 | |
| Vance | Enniskillen, Fermanagh | Not given | Not given | |
| Vandeleur | Clare | Did not emigrate | 1850 | |
| Vaughan | Tipperary, Mullinahone area | NY | 1869 | |
| Vincent | Unknown | Mooers, NY, USA | 1840 | |
| Wade | Enniscorthy, Co Wexford | Crawford Co. OH | 1847-1900s | |
| Walderfin | Unknown | NJ, USA | 1773 | |
| Waldron | Carlow, Wexford | Leeds, ON | 1790-1820 | |
| Waldron | Roscommon | Ohio, USA | 1800-1900 | |
| Walker | Ballyhaise,ButlersBr,CAV | Markdale, ONT | Bef 1860 | |
| Walker | Sligo or Enniscorthy | Montreal; VT, MA, IA | 1700> | |
| Wall | Co Cork | Boston MA | 1817-54 | |
| Wall | Co Waterford | NY | 1880s | |
| Wall | Newcastle, Tipperary | Australia | 1872 | |
| Wallace | Cloghoge Lodge, Creggan Par. Co Armagh | Mactaquac, New Brunswick CAN | 1839 | |
| Wallace | Tullyvernan, Co Tyrone | Boston, MA | 1800 | |
| Wallace | Armagh | Leeds Co, Ontario CAN | 1830 | |
| Wallace | Killyleagh/Rathcunningham/Killinchy,Co Down | USA | 1838 | |
| Wallace | Cork | Cardiff, Wales | 1825-1886 | |
| Wallace | Moolum/Roachestown,CoKilkenny | OH, SD | 1870s | |
| Walsh | Wexford, Carrick, St John, St Iberius | did not emig | 1820-1900 | |
| Walsh | Co Galway | New York | 1849-72 | |
| Walsh | Co Kilkenny | Downie Twp, Perth Co, ONT, CAN | 1830s | |
| Walsh | Mayo | Dunmore PA | 1860s | |
| Walsh | Unknown | Troy, NY | <1871 | |
| Walsh | Co Kildare | unknown if emig | 1820s-50s | |
| Walsh | Co Cork | New York | 1890s | |
| Walsh | Skeagh, Skibbereen, Co Cork | NY > St Louis MO | 1910 | |
| Walsh | Sligo, Mayo | Hartland,CT>Springfield,MA | Mid 1800s | |
| Walsh | Durrow, Co Laois | London | 1870-1890 | |
| Walsh | Skool,Co Limerick | NJ | 1875-1951 | |
| Walsh | Castlebar | Leeds Co, ONT, CAN | 1780s-1830s | |
| Walsh | Unknown | New South Wales, AU | 1840 | |
| Walsh | Claremorris, Co Mayo | MD | 1888-1918 | |
| Walsh | Magherafelt, Co Derry | New York | not given | |
| Walsh | Claran, Headford, Tuam, Co Galway | Boston, MA | 1895 | |
| Walsh/Welsh | Monaghan | Scotland | pre 1867 | |
| Walters | Eyrecourt, Ireland | Auburn, New York | 1856-1880 | |
| Ward | Co Wexford | NY | 1860s | |
| Ward | Co Monaghan | Govan, Glasgow, SCOT | ca 1850 | |
| Ward | Treanfohanaun, Co Mayo | Chicago, IL, USA | 1920 | |
| Ward | Co Roscommon | NYC> Jersey City, NJ | 1870 | |
| Ward | Ballygar, Co Galway | USA>Scot>NZ | not given | |
| Ward | Galway | Baltimore | 1820-1860 | |
| Ware | Cork | VA, USA | 1622-1659 | |
| Waring | Fermanagh | CAN | 1800? | |
| Warner | Bantry, Cork | Canada | 1829-35 | |
| Warnock | Knockbride, Co Cavan | England | 1700-1830 | |
| Warren | Co Wicklow | Shanghai, China | 1910/1920 | |
| Warren | Letterkenny, Donegal | Philadelphia, PA | not given | |
| Waters | Wexford | LA>IL, NE | 1843-1856 | |
| Waters | Aghagower, Westport, Co Mayo | Clifford & Keighley, WY, ENG | 1840-1850? | |
| Watt | Armagh | ONT, CA & QLD, AU | 1840-1875 | |
| Watt | Pomeroy par, Co Tyrone | ONT, CA > USA | 1840-1851 | |
| Webb | unknown, Cork | England | not given | |
| Webb | Co Cork | Wales | 1760-1766 | |
| Weir | Co Antrim | USA | 1841-66 | |
| Welch/Walsh | Unknown | Albany, NY | 1836-1863 | |
| Wells | Co Wexford | Guysborough, NS, CAN | 1780-1838 | |
| Welsby | Rathfarnham, Dublin | QLD, Australia | <1865 | |
| Westrip | Ballymena, Co Antrim | India | 1857 | J |
| Welsh, Walsh | Monaghan | Scotland | 1800-1870 | |
| Weyms | Co Cavan | Kingston, ONT, CAN | 1827 | |
| Whaley | Co Cavan | Kingston, ONT, CAN | 1827 | |
| Whelan | poss Co Waterford | NJ, CT | 1851-70 | |
| Whelan | Dungarvan, Waterford | Albany NY | 1895-1910 | |
| Whelan | Loughrea, Galway | Boston, MA | 1860-1870 | |
| Whelan/Phelan | Bansha Co Tipperary | New York | 1892 | |
| White | poss Co Roscommon | Albany NY, Milwaukee WI | 1847-1849 | |
| White | Tyrone | Christchurch, New Zealand | 1874 | |
| White | Tully, Clifton, Co Galway | NY, WI | 1830s | |
| White | Galway | Philadelphia, PA | 1750-1760 | |
| Whiteford | Antrim | Campbeltown,Argyll,Scot.&AU | 1826 | |
| Whitley | Co Cork | Canada | 1840 | |
| Whitely | Enniskillen | Canada | 1832 | |
| Whitney | Leitrim | Dundee SCOT | 1830-51 | |
| Whitney | Drumlish, Co. Longford | Scotland & Canada | 1900-13 | |
| Whitters | Enniskillen? | Scotland | 1810-1890 | |
| Widney | Co Tyrone | Philadelphia, PA | 1700-1784 | |
| Widdis | Cavan | Ontario | 1800-41 | |
| Wightman | Drumreagh, Co Down | not given | 1927-1800+ | |
| Wiley | Pettigo, Co Donegal | Australia | 1856 | |
| Wilkinson | Londonderry | Ontario CAN | ca 1842 | |
| Wilkinson | Rathfarnham, Dublin | QLD, Australia | <1865 | |
| Wilkinson | Wexford | Australia & London | 1660-Now | |
| Williams | Co Donegal, Fannett | Petrone, New Zealand | 1857-1929 | |
| Williams | Co Donegal, Kerrykeel | Philadelphia PA | 1815 onward | |
| Williams | Belfast, Co Antrim | Canada | 1913 | |
| Williams | Offaly | United States | 1846-1860 | |
| Williamson | Co Monaghan | Canada | late 1700s on | |
| Williamson | Co Armagh | Did not emigrate | early 1800s | |
| Willis | Banbridge, Co Down | New Zealand | 1824-64 | |
| Willoughby | Co Wexford | Canada | 1799-present | |
| Willoughby | Co Wexford | NZ | 1860-1880 | |
| Willoughby | Wexford & Dublin | New Zealand | 1700-1800s | |
| Wilson | unknown | Wigtownshire SCT | 1780-1815 | |
| Wilson | Tullylish, Banbridge, Co Down | not given | 1800-1900 | |
| Wilson | unknown | Scotland | 1835-50 | |
| Wilson | Co Donegal, Fannett | did not emig | 1849 onward | |
| Wilson | Co Armagh | Co Antrim | ca 1897 | |
| Wilson | Cambridge | Victoria, Australia | 1852 onwards | |
| Wilson | Balleymena, Antrim | Port Chalmers Otago NZ | 1860-1900 | |
| Wilson | Tyrone | Canada | not given | |
| Wilson | Drumcree Parish, Co Armagh | Manchester, CT, USA | 1871 | |
| Wilson | Mullaghbane, Co Monaghan | Australia & did not emig | 1800s-1860s | |
| Wilson | Dublin | not given | not given | |
| Wilson | Tyrone, Fermanagh | Canada | 1927 | |
| Wilson | Ireland | Ontario, Canada | Abt 1828 | |
| Wilson | Co Fermanagh | NSW, AU | 1857 | |
| Wilson | Galway, Co Mayo | Australia | 1800 | |
| Windrum | Antrim | USA | 1800-1900 | |
| Winston | Ballinlough, Castlereagh, Roscommon | East Boston MA | 1870s | |
| Winters | Broadford/Gortnaclohy, Co Limerick | Lakeview, OR | 1888-1911 | |
| Winters | Co Offaly | Brooklyn, NY | 1870s | |
| Wise | Cork | New South Wales, AU | 1815 | |
| Withers | Unknown | NY | by 1850 | |
| Wixted | Newport, Co Tipperary | Chicago, IL | 1870 | |
| Woods | Foynes; Co Limerick | Christchurch, NZ | unknown | |
| Wo(u)lfe, Woolfe | Co Clare, Limerick | Australia | 1864 | |
| Wood | unknown, Cork | England | not given | |
| Woodburn | Donegal, Derry, Mayo | Canada | 1840-1850 | |
| Woodlock | Tipperary | Syracuse NY | 1840-1860 | |
| Woodney | Co Tyrone | Philadelphia, PA | 1700-1784 | |
| Woods | Belfast | not given | not given | |
| Woods | Amargh | New South Wales,AU | 1907 | |
| Woods | Newry, Co Down | Brooklyn, NY | 1850s | |
| Woodside | Co Down | Liverpool, ENG | Bef.1841 | |
| Wright | Co Dublin | not given | not given | |
| Wright | Co Limerick | Toronto, Canada, Buffalo NY | late 1860s | |
| Wright | Loughgall& Drumcree Par., Co Armagh | Manchester, CT | 1860 | |
| Wrinn | Co Kerry | Philadelphia, TN, USA | 1828-1862 | |
| Wrynn | Kiltyclogher | Brooklyn NY | 1848-1945 | |
| Wybrant | Co Wicklow | McDonough Co, IL | 1830-1850 | |
| Wylie | Londonderry | Canada | Any | |
| Wynne | unknown | NY; Hawley & Scranton, PA | not given | |
| Yeoman | Co Down | not given | 1800-1900 | |
| Young | unknown | N. Carolina | 1788-1850 | |
| Young | Liss,Tullaroan,Co Kilkenny | Trenton, NJ | 1798> |
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