Henry John Innes-Ker, 8th Duke of Roxburghe KT MVO (24 July 1876 – 29 September 1932) was a Scottish peer and courtier.

He was the son of James Henry Robert Innes-Ker, 7th Duke of Roxburghe (1839–1892) and Lady Anne Emily Spencer-Churchill (1854–1923), the fourth daughter of John Spencer-Churchill, 7th Duke of Marlborough, who served in Conservative governments as Lord President of the Council and Lord Lieutenant of Ireland, and his wife, Lady Frances Vane, daughter of the 3rd Marquess of Londonderry.

[4] In 1895, he gained the rank of 2nd lieutenant in the service of the 4th Battalion, Argyll and Sutherland Highlanders (Militia) In 1900, he served with the Household Cavalry composite regiment in South Africa during the Second Boer War.

[7] He was appointed a Knight of the Order of the Thistle (KT) in the 1902 Coronation Honours list published on 26 June 1902,[8] and was invested by King Edward VII at Buckingham Palace on 8 August 1902.

[12][13] They lived at Floors Castle on 60,500 acres,[4] which Mary decorated with her own collection of art including a series of 17th century Gobelins Manufactory tapestries.