My HENNIGAN clan hails from Ballina, Co. Mayo. I've found that the surname has been spelled a number of different ways; HENNIGAN, HENEGHAN, HENIGAN, HENNEGAN, HENEGHER, etc. Other surnames that tie into my family are: Bichele, Boller, Daugherty, Deignan, Dunbar, Fitzmaurice, Gibbons, Gillard, Mullen, O'Mullen and Strogin. Please email me direct if you see a connection at: witteg@zoomtown.com