W. T. Cosgrave
 William Thomas W. T. Cosgrave (Irish: Liam Tomás Mac Cosgair; 6 June 1880 – 16 November 1965) was an Irish politician who succeeded Michael Collins as Chairman of the Irish Provisional Government from August to December 1922. He served as the first President of the Executive Council (prime minister) of the Irish Free State from 1922 to 1932.