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