[1] He was educated at Oriel College, Oxford, where he matriculated in 1761, and studied law at the Middle Temple, where he was admitted in 1759.
[3] Up to 1772, the families were allied in their agreement over whom to return as the county's single Member of Parliament; Edward Kynaston was their choice, but he died in 1772, followed by Henry Herbert, 1st Earl of Powis.
[1] He was considered a Portland Whig by 1792, but his ill health caused his attendance to decline, and he died on 11 March 1795.
[5][6] With her, he had the following issue: He died on 11 March 1795 and was succeeded in his estate by his eldest son, William Mostyn Owen.
[16] Through his daughter, Frances Maria Owen, he was grandfather to Richard Noel Noel-Hill, 5th Baron Berwick (1800–1861).