 John Courtenay, 15th Earl of Devon

Sir John Courtenay (c. 1435 – 4 May 1471) was the third son of Thomas Courtenay, 13th Earl of Devon, and Margaret Beaufort, and was styled Earl of Devon by Lancastrians in exile, following the execution of his brother the 14th earl in 1461.Courtenay is said to have been born in 1435, the third son of Thomas Courtenay, 13th Earl of Devon, by Margaret Beaufort, the daughter of John Beaufort, 1st Earl of Somerset.