Tags: Noble.
Arthur Mountifort Longfield Ponsonby 11th Earl of Bessborough (11 December 1912 – 5 April 2002) was a British peer. He was the son of Maj. Hon. Cyril Myles Brabazon Ponsonby second son of Edward Ponsonby 8th Earl of Bessborough and his wife Rita Narcissa Longfield daughter of Lt. Col. Mountifort John Courtenay Longfield. He inherited the earldom on 5 December 1993 when his cousin Frederick Ponsonby 10th Earl of Bessborough died without a male heir.
