Thomas Jeeves Horder, 1st Baron Horder, GCVO (7 January 1871 โ 13 August 1955) was a British physician best known for his appointments as physician-in-ordinary to Kings Edward VII, Georges V and VI, and extra physician to Queen Elizabeth II. He was also the chosen physician of three prime ministers. He was knighted in 1918, made a baronet in 1923 and raised to the peerage in 1933.