Hallahan Family History
Hallahan Surname Meaning
Irish (Cork and Waterford): Anglicized form of Gaelic Ó hÁilleacháin ‘descendant of Áilleachán’ a personal name from a diminutive of áille ‘beauty’.
This Cork surname is sometimes confused with Halligan an Ulster surname.
Source: Dictionary of American Family Names 2nd edition, 2022
