Thomas Bruce, 2nd Earl of Ailesbury and 3rd Earl of Elgin, styled Lord Bruce between 1663 and 1685, was an English politician and memoirist. He was the son of Robert Bruce, 2nd Earl of Elgin, and Lady Diana Grey. His maternal grandparents were Henry Grey, 1st Earl of Stamford, and Lady Anne Cecil, daughter of William Cecil, 2nd Earl of Exeter. His Memoirs, which were not published until long after his death, are a valuable source for English history in the last quarter of the seventeenth century.

Robert Bruce, 1st Earl of Ailesbury and 2nd Earl of Elgin, PC, FRS, was a Scottish politician who sat in the House of Commons from 1660 to 1663, when he inherited his father's title as Earl of Elgin.