Hennigan Family History
Hennigan Surname Meaning
Irish (Mayo and Sligo): Anglicized form of Gaelic Ó hEidhneacháin ‘descendant of Eidhneachán’ a personal name apparently based on the word eidheann ‘ivy’.
A shortened form has been Anglicized as Heenan.
Source: Dictionary of American Family Names 2nd edition, 2022
