Monahan Family History
Monahan Name Meaning
Irish: Anglicized form of Gaelic Ó Manacháin ‘descendant of Manachán’ a personal name representing a diminutive of manach ‘monk’. See also Monk . The Gaelic name is sometimes interpreted as if it were Ó Muineacháin ‘descendant of the little shrubbery’ and is sometimes translated into English as Thornton . The name is also found in Scotland.
Source: Dictionary of American Family Names 2nd edition, 2022