Mary "May" Innes-Ker, Duchess of Roxburghe (née Goelet; October 6, 1878 – April 26, 1937)[1] was an American-born heiress and socialite who married into Scottish nobility.

[10] In the late December 1898, she was rumored once more to be engaged to Viscount Crichton (1872–1914), eldest son and heir of the 4th Earl Erne.

[12][13][14] He was the son of James Henry Robert Innes-Ker, 7th Duke of Roxburghe and Lady Anne Emily Spencer-Churchill, 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.

[16] After ten years of childlessness, Mary gave birth to a son and heir: The Duchess of Roxburghe died on April 26, 1937, in London.

[1][18] The 8th Duke and Duchess of Roxburgh settled at Floors Castle, where Mary decorated the fortress with her own collection of art including a priceless series of 17th century Gobelins Manufactory tapestries.