Admiral Sir Bertram Sackville Thesiger KBE CB CMG DL (14 January 1875 – 12 May 1966) was a Royal Navy officer who went on to be Commander-in-Chief, East Indies Station.

Sir Edward Pierson Thesiger, Clerk to the House of Lords, and Georgina Mary Stopford.

[3] He served in World War I as commanding officer of HMS Inconstant at the Battle of Jutland[2] and was invested as a Companion of the Order of the Bath (CB) in 1916.

[2] He was recalled during the Second World War to be Convoy Commodore, with the rank of commodore, 2nd class Royal Naval Reserve from 1940 to 1942 and then to be Flag Officer in charge at Falmouth from 1942 to 1944.

[6] In 1921 he married Violet Brodrick Cloete (née Henley) in Malta.