Richard Rhys, 9th Baron Dynevor

Richard Charles Uryan Rhys, 9th Baron Dynevor (19 June 1935 – 12 November 2008) was a British peer.

In 1959 he married Lucy Catherine King, the only daughter of Sir John Knewstub Maurice Rothenstein CBE.

In 1962 Lord Dynevor inherited the remaining holdings of the Llandeilo Estate, comprising 23 farms, and 2,000 acres (8 km2), a ruined castle, a deer park with a herd of rare long horned white cattle, and a substantial death duties bill.

Attempts were made to save the patrimony but eventually the castle was sold to a private buyer in 1974.

Newton House was purchased by the Trust in 1990 having been through several hands since first sold by Lord Dynevor in 1974.