Henry Arthur Cadogan, Viscount Chelsea, was born 13 June 1868 in London, England, United Kingdom to George Henry Cadogan, 5th Earl Cadogan (1840-1915) and Beatrix Jane Craven (1844-1907) and died 2 July 1908 Temple House, Theobalds Park, Herefordshire, England, United Kingdom of cancer. He married Mildred Cecilia Harriet Sturt (1869-1942) 30 April 1892 in Trinity Church, Sloane Street, London, Greater London, England, United Kingdom.
|Offspring of Henry Arthur Cadogan and Mildred Cecilia Harriet Sturt (1869-1942)|
|Sibyl Louise Beatrix Cadogan (1893-1969)|
|Edith Mary Winifred Cadogan (1895-1969)|
|Cynthia Hilda Evelyn Cadogan (1896-1966)||8 October 1896||13 March 1966||Humphrey Edmund de Trafford, 4th Bt. (1891-1971)|
|Alexandra Mary Hilda Cadogan (1900-1961)||22 February 1900 England, United Kingdom||23 May 1961 England, United Kingdom||John Albert Edward William Spencer-Churchill, 10th Duke of Marlborough (1897-1972)|
|Victoria Laura Cadogan (1901-1991)|
|Edward George John Humphrey Cadogan (1903-1910)|