They were later joined by the Duke of Somerset and the Earl of Devon, who brought their forces from the West Country.
Devon | Thomas Jefferson | Thomas Edison | Thomas | Thomas Hardy | Thomas Mann | 14th United States Congress | Thomas Aquinas | Clarence Thomas | Thomas Gainsborough | Dylan Thomas | Thomas Pynchon | James Earl Jones | St. Thomas | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Saint Thomas, U.S. Virgin Islands | Herbert Kitchener, 1st Earl Kitchener | Thomas Carlyle | Thomas the Tank Engine | Thomas Moore | Thomas Cromwell | Thomas Becket | Earl | 14th Dalai Lama | Frederick Roberts, 1st Earl Roberts | Thomas the Apostle | Thomas Merton | Earl of Derby | Earl Warren |
The 11th Earl married Maud Camoys, and the earldom remained in their descendants until their great-grandson, Thomas Courtenay, 14th Earl of Devon, was beheaded at York on 3 April 1461 after the Battle of Towton, dying without issue.
Courtenay married, at Coventry, Warwickshire, shortly after 9 September 1456, Mary of Anjou, illegitimate daughter of Charles, Count of Maine.
Margaret Beaufort, Countess of Devon (c. 1409–1449), the daughter of John Beaufort, 1st Earl of Somerset, the mother of both Thomas Courtenay, 14th Earl of Devon and John Courtenay, 15th Earl of Devon.