Sidney Montagu, 11th Duke of Manchester

Sidney Arthur Robin George Drogo "Kim" Montagu, 11th Duke of Manchester (5 February 1929 in Kimbolton Castle, Huntingdonshire – 3 June 1985), was a British hereditary peer, the son of The 10th Duke of Manchester and the elder brother of the 12th Duke.

He married firstly on 5 February 1955 Adrienne Valerie Christie (divorced 1977/1978) (d. 1988), daughter of Commander John Kenneth Christie; at that time the South African Ambassador in Kenya. Later of Karawater farm, Ruigtevlei, Cap, South Africa. He married secondly on 25 August 1978 Andrea Joss, daughter of Cecil Alexander Joss of Johannesburg, South Africa (d. 21 January 1996), who had previously been married twice, to Major S. Whitehead and to G. J. W. Kent. He had no children from either marriage.

In 1983, the Duke sued his stepmother Elizabeth, who he believed had possession of several family heirlooms that he felt were rightfully his.

The Duke died suddenly at Robin Hood Ranch, Tennessee on 3 June 1985. His funeral took place on 13 June and he is buried at Kimbolton Parish Church.

The Duke in 1981, by Allan Warren

His second wife Andrea in 1982, by Allan Warren

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