Lieutenant-Colonel Sir Rhys Llewellyn, 2nd Baronet, (9 March 1910 â 25 April 1978) was a Welsh mining executive, soldier, author and dignitary.
He was born in Aberdare, South Wales, the son of Sir David Llewellyn, 1st Baronet, a colliery owner, and his wife, Magdalene Anne, Lady Llewellyn ( Harries).
Educated at Oundle School and Trinity College, Cambridge, he was the Managing Director of Graigola Merthyr from 1934 to 1947; Master of the Brecon and Talybont Foxhounds from 1936 to 1940; an officer in the Welsh Guards during World War II; and High Sheriff of Glamorgan from 1950 to 1951.
Sir Rhys Llewellyn, 2nd Baronet, died unmarried on 25 April 1978, aged 68.