Llewelyn Traherne (13 March 1766 – 5 December 1842) was a Welsh magistrate and briefly High Sheriff of Glamorgan in 1801.
He was a Justice of the Peace in 1783; was an active Magistrate; officiated as chairman of Quarter Sessions; and was appointed Receiver General in 1792.
He was gazetted and sworn in as High Sheriff in 1801, but because of a misunderstanding with George Hardinge, then Chief Justice of the Brecon Circuit, he was superseded before the first Assizes.
of St Hilary, Vale of Glamorgan, by whom he had a son, John Montgomery Traherne (1788-1860), and three daughters, Charlotte-Frances, Maria-Eleanor, Louisa.
[2] Charlotte Traherne's children became the representatives of the ancient families of Dive of Ranton, Staffordshire, and Metham of North Cave, Yorkshire.