Ó Cuanachain is a surname of Irish origin, often associated with the Gaelic name Ó Cuanaigh. It signifies "descendant of Cuanaigh," with "Cuanaigh" meaning "the one who is wise" or "the one who is clever." This surname is primarily found in Ireland and is linked to various historical families and clans. The Ó Cuanachain family has roots in County Kerry and County Clare, where they were part of the local Gaelic nobility. Like many Irish surnames, it reflects the rich cultural heritage and lineage of the Irish people, showcasing the importance of ancestry in Irish society.