Eileen (O'Mahony) McMahon of Ireland was born in CE to Mary Margaret (Hehir) O'Mahony and Thomas F. 'Tomás' O'Mahony. She had siblings Micheál J. 'Hauley' O'Mahony, Margaret (Peggy) O'Mahony (Mahony), Evelyn (O'Mahony) Quinn, Mary (O'Mahony) (Mahony), Joan O'Mahony, and Monica 'Mona' (O'Mahony) Maloney. Eileen McMahon married Alo McMahon, and died on December 26, 2001 in Carrignavar, CO.