John Vaughan, 1st Earl of Carbery

John Vaughan, 1st Earl of Carbery (1574 or 1575 – 6 May 1634) was a Welsh courtier and politician who sat in the House of Commons in 1601 and from 1621 to 1622. He served Robert Devereux, 2nd Earl of Essex and later Prince Charles, heir to the throne of King James I. However, his career ended when the Prince acceded to the throne in 1625, and he later estimated that serving the Prince had cost him £20,000, which went unrecompensed.

Born to a Carmarthenshire family, Vaughan was the son of Walter Vaughan of Golden Grove, Llandeilo (who died 1597), and his wife Katherine, a daughter of Gruffydd ap Rhys of Dinefwr. His Vaughan grandfather, another John, was the first of the family to settle at Golden Grove and claimed descent from Bleddyn ap Cynfyn (died 1075), a Prince of Gwynedd and of Powys. Vaughan's father married secondly Letitia, a daughter of Sir John Perrot, Lord Deputy of Ireland.

His brothers included the writer William Vaughan. and the MP Henry Vaughan

Vaughan matriculated from Jesus College, Oxford in 1592 at the age of 17. He became a member of the Inner Temple in 1596. His early career was linked with Robert Devereux, 2nd Earl of Essex – Essex described Vaughan as his "servant" in 1598 and Vaughan married the daughter of Essex's steward in Wales. He followed Essex on his expedition to Ireland in 1599 and was knighted by him. When Essex revolted against Queen Elizabeth, Vaughan's links to Essex meant that he came under suspicion for a time. He represented the constituency of Carmarthenshire in the Parliament of 1601 (and also in the 1621 Parliament), and his reputation was restored. He concentrated on his position in Carmarthenshire in the years following the accession of King James I in 1603. He was appointed High Sheriff of Carmarthenshire for 1605.

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