Naturalization and Citizenship
Irish naturalization required an act of parliament. A less expensive choice than naturalization was called denization, a process for granting rights of a subject, except the right to inherit property or to hold public office. A denizen simply paid a fee and took an oath of allegiance. Generally, denization or naturalization was granted to male adults only.
There are no complete sets of naturalization records. Note: very few Irish immigrants actually went through the process of denization or naturalization so most do not appear in any official records.