Frank C. J. MacDermot (25 November 1886 – 24 June 1975) was an Irish barrister and politician. MacDermot was born in Dublin, the seventh and youngest son of Hugh Hyacinth O'Rorke MacDermot, Prince of Coolavin. He was educated at Downside School and the University of Oxford and qualified as a barrister. He was commissioned into the Royal Army Service Corps during World War I and ended the war as a Major. He later emigrated to the United States and became a banker in New York City from 1919–27. He returned to Ireland in the late 1920s and stood unsuccessfully as an Independent Republican candidate for Belfast West at the 1929 United Kingdom general election. An anglophile he was elected to Dáil Éireann at the 1932 Irish general election as an independent Teachta Dála (TD) for Roscommon. He f