William T Cosgrave
William Thomas Cosgrave (5 June 1880 – 16 November 1965) was an Irish Fine Gael politician who served as the president of the Executive Council of the Irish Free State from 1922 to 1932, leader of the Opposition in both the Free State and Ireland from 1932 to 1944, leader of Fine Gael from 1934 to 1944, founder and leader of Fine Gael's predecessor, Cumann na nGaedheal, from 1923 to 1933, chairman of the Provisional Government from August 1922 to December 1922, the president of Dáil Éireann from September 1922 to December 1922, the minister for Finance from 1922 to 1923 and minister for Local Government from 1919 to 1922. He served as a Teachta Dála (TD) from 1921 to 1944. He was a Member of Parliament (MP) for the North Kilkenny constituency from 1918 to 1922.While Cosgrave never officially held the office of Taoiseach (the current title of Ireland's prime minister, created in 1937), Ireland considers him to be its first Taoiseach due to having been the Free State's first head of government. His son, Liam, served as Taoiseach from 1973 to 1977.