Aelred Sillem (29 October 1908 – 19 May 1994) was second abbot of Quarr Abbey, on the Isle of Wight, from 1964 to 1992. Sillem was educated at Haileybury and Magdalen College, Oxford, and received the habit at the Benedictine abbey of St Gregory, Downside, in 1929. He studied theology in Munich in the years 1931–1933 and then in 1934 asked to be transferred to Quarr Abbey, on the Isle of Wight. He was ordained a priest at Quarr's mother abbey, Solesmes, in France, on 22 August 1937. He was Superior of the Solesmes Congregation community at Farnborough in the difficult years of 1941–1947.