Lieutenant-Colonel Sir Blair Aubyn Stewart-Wilson KCVO (17 July 1929 – 24 May 2011) was equerry to Queen Elizabeth II and Deputy Master of the Household from 1976 to 1994.
[3] His mother, who was lady laird of Balnakeilly, married secondly Major Charles Greville Bartlett Stevens, and took the name of Stewart-Stevens.
[2] His older brother Ralph Stewart-Wilson (1923–2015) eventually succeeded their mother as laird of Balnakeilly in Perthshire.
Stewart-Wilson was promoted lieutenant-colonel and was a general staff officer grade 1 (GSO1) in the foreign liaison section (Army) from 1970 to 1973, and Defence Military and air attaché in Vienna, 1975–1976.
[5] He was HM's representative trustee on the board of the Royal Armouries from 1995 to 2004 and served as the Somerset County Patron for the charity Cancer Research UK from 1997 until his death.