Seán Moylan was a senior officer of the Irish Republican Army and later a Fianna Fáil politician. He served as Minister for Agriculture from May 1957 to November 1957, Minister for Education from 1951 to 1954, Minister for Lands from 1943 to 1948, Parliamentary Secretary to the Minister for Finance from February 1943 to June 1943 and Parliamentary Secretary to the Minister for Industry and Commerce from 1937 to 1943. He became a Senator from May 1957 to November 1957, after being nominated by the Taoiseach. He was also elected as a Teachta Dála (TD) from 1921 to 1923 and from 1932 to 1957.

Seán Hogan was one of the leaders of the 3rd Tipperary Brigade of the Irish Republican Army during the War of Independence.