Ó Cinnéide is a surname of Irish origin, commonly associated with the Gaelic name meaning "descendant of Cinnéidigh." This name is linked to the ancient Irish clans and is often found in historical records throughout Ireland. The name is particularly prevalent in County Kerry and County Clare, where many families bearing the surname have roots. Ó Cinnéide is sometimes anglicized as "Kennedy," which is a more widely recognized version of the name in English-speaking countries.