He was the third and youngest son of Major-General John Charles Bentinck and his wife Jemima Helena, eldest daughter of Frederick de Ginkell, 6th Earl of Athlone.

[9] Following the death of Sir George Cathcart, he was attached to the fourth division, however aftereffects of his wound delayed his accession until June 1855.

[1] After his return to England he was awarded a Knight Commander of the Order of the Bath and a Commandeur of the French Légion d'honneur for his services in Russia.

[11] In 1860, he was promoted to lieutenant-general[4] and in 1865, he received a commission as honorary colonel of the 1st London Artillery Volunteer Corps.

[1] Bentinck died at Grosvenor Street in London on 29 September 1878, aged 82 and was buried at Kensal Green Cemetery.