Winifred Anna Cavendish-Bentinck, Duchess of Portland DBE JP (née Dallas-Yorke; 7 September 1863 – 30 July 1954) was a British humanitarian and animal welfare activist.

[1] Born at Murthly Castle, Perthshire, she was the only daughter of Thomas Yorke Dallas-Yorke, DL, JP (1826 – 25 November 1924), of Walmsgate, Lincolnshire, and Frances (née Graham).

[2] "In addition to the famous racing stables, where a number of the Duke of Portland's most celebrated horses (including "St. Simon") were to be seen, there is a group of substantially built almshouses, known as "The Winnings," which were erected by the Duke at the request of his wife out of the money won in seven races, viz., the Two Thousand Guineas in 1888 by "Ayrshire", the Derby and St. Leger in 1889 by "Donovan", the Oaks and St. Leger in 1890 by "Memoir", and the One Thousand Guineas in 1890 by "Semolina".

[10]In honour of her support, the Nottinghamshire Miners' Welfare Association petitioned the king on her behalf; and in 1935 she was made a Dame Commander of the Order of the British Empire (DBE) on his silver jubilee.

[citation needed] In 2010, a collection of jewels belonging to the Duchess was auctioned at Christies, including antique pearl and diamond brooches,[11] and the Portland sapphire tiara.