What is "macnamara"

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.