Richard Óge Martyn (c. 1602 – 1648) was a Galway lawyer and member of the Catholic Confederates of Ireland. He was of the senior line of the Martyn family, one of the Tribes of Galway. He lived at Dunguaire Castle, Kinvarra. He worked with his brother-in-law and first cousin, Patrick Darcy, against the Plantation of Connaught in the 1630s, and served on the Supreme Council of the Confederate Catholics in the 1640s. Martyn also served as Mayor of Galway, 1642–1643.
Friends and acquaintances included John Lynch (Gratianus Lucius), Mary Bonaventure Browne, and Sir Dermott Ó Seachnasaigh. His contemporaries included Mícheál Ó Cléirigh and Randal MacDonnell, 1st Marquess of Antrim.
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... He was survived by his wife, Magdalene French, and five surviving children, Oliver Óge Martyn, Peter, John, Patrick and Magdalene, and his father Oliver Mór Martyn ... the first president of Sinn Féin, Edward Martyn (1859–1923), and the leader of the Irish Unionist Alliance and Ulster Unionist Party Edward Carson ... A later descendant was the Hungarian artist, Ferenc Martyn (1899–1986) ...