Ian Lionel Malcolm Leslie, 21st Earl of Rothes (10 May 1932 – 15 April 2005) was a Scottish nobleman. The eldest son of the 20th Earl and Beryl Dugdale, he was educated at Eton and was a Sub-Lieutenant in the Royal Naval Volunteer Reserve from 1953. In 1955 he married Marigold Evans-Bevan of Wales, daughter of Sir David Evans-Bevan. They had two sons: James (b. 1958) and Alexander (b. 1962).