Mac Conmara (anglicised as MacNamara or McNamara) is an Irish surname of a family of County Clare in Ireland. The MacNamara family were a Dál gCais sept and after the O'Briens one of the most powerful families in the Kingdom of Thomond as Lords of Clancullen (a title later divided into East and West families). They are related to the O'Gradys, also descended from the Uí Caisin line of the Dál gCais. The name began with the chieftain Cumara, of Maghadhair in county Clare. Cumara is a contracted form of Conmara – hound of the sea. His son, Domhnall, who died in 1099, adopted the surname Mac Conmara, or son of Cumara, thus becoming the very first MacNamara. The name has survived relatively unmodified as MacConmara in Irish and Mac (or Mc) Namara in English Less