Save Type Surname (from given name) Usage Irish Expand LinksMeaning & History Variant of O'HANNAGAIN. DetailsRelated Names VariantsHanegan, Hanigan, Hannigan, Hannigen, O'Hanegan, O'Hanigan, O'Hannagain, Ó hAnnagáin, O'Hannagan, O'Hannegan, O'Hannigan Entry updated October 30, 2011 ·