Save Type Surname (from given name) Usage Irish Expand LinksMeaning & History Anglicized form of Irish Ó Tadhgáin meaning "descendant of TADHGÁN". DetailsRelated Names VariantÓ TadhgáinOther Languages & CulturesMac Cormaic, Mac Thaidhg, McCaig, McCormick(Scottish) Categories anglicizations Entry updated November 16, 2019 ·