The Hamlyn, later Hamlyn-Williams Baronetcy, of Clovelly in the County of Devon, was a title in the Baronetage of Great Britain. It was created on 7 July 1795 for James Hamlyn. He was the husband of Arabella, daughter of Thomas Williams. Their son, the second Baronet, assumed the additional surname of Williams in 1798. The title became extinct on the death of his son, the third Baronet, in 1861. All three Baronets represented Carmarthenshire in Parliament. Charles Hamlyn-Williams, younger son of the second Baronet, was a Rear-Admiral in the Royal Navy.
Susan Hester, daughter of the third Baronet, inherited the family seat of Clovelly Court, Clovelly, Devon. She married Henry Fane, who assumed the additional surname of Hamlyn.