Lieutenant-Colonel Robert Edward Archibald Udny-Hamilton, 11th Lord Belhaven and Stenton, CIE, DL (8 April 1871 – 26 October 1950) was a Scottish representative peer and a soldier. On 15 November 1898, he married Kathleen Gonville Bromhead and they had two children: * Hon. Julia Hamilton (1901–1971), married the 4th Baron Raglan and had issue. * Robert Alexander Benjamin Hamilton, 12th Lord Belhaven and Stenton (1903–1961) married (1) Heather Mildred Carmichael Bell and had issue and (2) Cyrilla Mary Binns, Lady Belhaven and Stenton and had issue.