He was born on 6 December 1895, the second son of Sir Thomas Stafford, 1st Baronet and his wife, Frances Agnes, daughter of Edward King-Harman.
[2] His elder brother, Edward Charles Stafford King Harman, was killed in the First World War.
[7] Previously a captain in the yeomanry, during the Second World War Stafford-King-Harman served in the King's Royal Rifle Corps from 7 May 1940[8] until 2 April 1943, when as temporary lieutenant-colonel he relinquished his command due to ill health and was granted honorary rank of major.
[9] After the death of John Keane in 1956, Seán T. O'Kelly, the President of Ireland, appointed Stafford-King-Harman to the Council of State.
[11] Lacking the funds to rebuild the house, he sold the remaining estate of 2,400 acres (970 ha) at auction in 1959.