(of Irish origin. derived from the pre 10th century Mac an Ultaigh meaning the "son of the Ulsterman. Note: Murtaugh has: argentt, two chevronnels betw three crosses pattee, fitchee, at the foot, gules. Crest: a lion, passant, guardant, gu. ) Argent, on a mount vert, a stag rampant proper and in the dexter a lion rampant gules, both supporting a hand of ulster, gules. Source (Irish Familties by Edward MacLysaght).