Lieutenant-Colonel Sir Rhys Llewellyn, 2nd Baronet (9 March 1910 – 25 April 1978), was a Welsh mining executive, soldier, author and dignitary.
He was born in Aberdare in south Wales, the son of Sir David Llewellyn, 1st Baronet, a colliery owner, and his wife, Magdalene Anne, Lady Llewellyn (née 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.
Death
Sir Rhys died unmarried on 25 April 1978, aged 68. He was succeeded in the baronetcy by his brother Harry.