Heenan Family History
Heenan Name Meaning
Anglicized form of Gaelic Ó hÉanáin ‘descendant of Éanán’. Woulfe, however, believes it to be a form of Ó hEidhneáin, which he derives from a diminutive of eidhean ‘ivy’. sometimes a reduced version of Heneghan.
Source: Dictionary of American Family Names ©2013, Oxford University Press