Lawrence Aldred Mervyn Dundas, 3rd Marquess of Zetland (12 November 1908 – 5 October 1989), was a British hereditary peer, known before 1961 as the Earl of Ronaldshay.
Like his father and grandfather before him, he was educated at Harrow School and Trinity College, Cambridge.
They had four children:[1] Lord Zetland's niece, Carolyne Christie, was married to Rock Scully, manager of The Grateful Dead, and later, in 1976, to Roger Waters of Pink Floyd.
[2] His nephew, Carolyne's younger brother Willie Christie, is a photographer and film director.
[3] Lord Zetland died in 1989 at the age of 80 and was succeeded in the marquessate and other titles by his eldest son, Mark.