 Jimmy O'Dea, the well known comedian, acted as Lemass's best man.Together Seán and Kathleen had four children – Maureen (1925–2017), Peggy (1927–2004), Noel (1929–1976) and Sheila (1932–1997).Maureen Lemass would later go on to marry a successor of Lemass as Fianna Fáil leader and a future Taoiseach, Charles Haughey.