William Arthur Henry Cavendish-Bentinck, 7th Duke of Portland, was born 16 March 1893 in Mayfair, London, England, United Kingdom to William Cavendish-Bentinck, 6th Duke of Portland (1857-1943) and Winifred Anna Dallas-Yorke (1863-1954) and died 21 March 1977 Nottinghamshire, England, United Kingdom of unspecified causes. He married Ivy Gordon-Lennox (1887-1982) 12 August 1915 .
|Offspring of William Arthur Henry Cavendish-Bentinck, 7th Duke of Portland and Ivy Gordon-Lennox (1887-1982)|
|Alexandra Margaret Anne Cavendish-Bentinck (1916-2008)|
|Victoria Margaret Cavendish-Bentinck (1918-1955)|