The Ó Flannagáin family is an Irish family name that originates from the Gaelic name "Ó Flannagáin," meaning "descendant of Flannagan." This family is primarily associated with the province of Connacht in Ireland, particularly in County Galway. The name is linked to the ancient Gaelic nobility and has historical significance in Irish culture. Members of the Ó Flannagáin family have contributed to various fields, including literature and politics. The family name is often associated with the Flannagan surname, which has variations in spelling. Today, descendants of the Ó Flannagáin family can be found in Ireland and among the Irish diaspora worldwide.