His father died in 1855. St Maur succeeded his elder brothers Edward (1804–1885), and Archibald (1810–1891), both of whom died without living male heirs, in the dukedom.[2]
On 17 May 1845, he married Horatia Isabella Harriet Morier, daughter of diplomat John Philip Morier.[3][4] They had four sons:
Major Lord Percy St. Maur (11 November 1847 – 16 July 1907), m. the Hon. Violet White, daughter of Luke White, 2nd Baron Annaly and had issue.[5]
Lord Ernest St. Maur (11 November 1847 – 21 May 1922)
Lord Edward St. Maur (7 February 1849 – 15 September 1920)
He died suddenly while visiting the Wells, Somerset home of Charles Clement Tudway (the son of MP Robert Tudway). He experienced indigestion followed by an apparent heart attack.[1]
Ancestry
Ancestors of Algernon St Maur, 14th Duke of Somerset