Sir Thomas Clayton (c 1612 – 4 October 1693), known in his father's lifetime as Thomas Clayton the Younger, was an English physician and professor of medicine who sat in the House of Commons in 1660. Clayton was the son of Thomas Clayton MD of Oxford, the last Principal of Broadgates Hall and the first Master of Pembroke College. He matriculated there on 25 May 1627, aged fifteen, and was graduated BA on 22 January 1629, MA on 17 October 1631. He was of Gray's Inn in 1633. Further awards from Oxford were B.Med. on 18 July 1635 and D.Med. on 19 June 1639. He was Regius Professor of Medicine at Oxford from 1647 to 1665, succeeding his father. In 1660, Clayton was elected one of the two Members of Parliament for Oxford University in the Convention Parliament. He was knighted on 27 March 1661. From 1661 to 1693 he was warden of Merton College, Oxford. Clayton was of La Vache, Buckinghamshire. He died at the age of 80. References 1612 births 1693 deaths Members of the pre-1707 Parliament of England for the University of Oxford Alumni of Pembroke College, Oxford Members of Gray's Inn Wardens of Merton College, Oxford 17th-century English medical doctors Year of birth uncertain English MPs 1660 Regius Professors of Medicine (University of Oxford)