Theobald David Mathew (7 April 1942 – 24 December 1998) was an officer of arms at the College of Arms in London. Theobald Mathew was the son of solicitor Robert Mathew and Joan Young, and great-nephew of Sir Arthur Cochrane, Clarenceux King of Arms from 1928 to 1954. He was educated at Downside and Balliol College, Oxford. Theobald Mathew was made an Esquire of the Venerable Order of Saint John in 1977, and an Officer in 1986. In 1998, he died at West Mersea, Essex, aged 56.