Click on the red marker on the map below for a link to the full 1901 census entry.
Quite numerous: Galway, Tipperary, Kilkenny. Ir. Mac Cormaic. From the very popular personal name Cormac, derivation of which is not clear. Usually as MacCormack.
Mac Cormack, Mac Cormick: an-líonmhar ins gach aird: go sonrach Lár na Tíre & oirthear Uladh - Albanaigh iad sa, cuid mhaith. Tháinig an sloinne seo i bhfeidhm in áiteanna éagsúla timpeall na tíre. Bhí clann amháin aitheanta i Longfort.IF.
Very numerous: all areas, especially Midlands. Ir. Mac Cormaic (son of Cormac), a popular first name. There was a sept in Longford but the name is general.
Very numerous: E Ulster, less so elsewhere. Otherwise as Mac Cormack. Mac Lysaght considers many of the Ulster people to be of Scottish origin.