He was the son of Francis Robert Stonor, 4th Baron Camoys (1856–1897) and the former Jessie Philippa Carew.

[2] He was educated at the Oratory School in London and at Balliol College, Oxford and served as Attaché to Madrid.

On 25 November 1911, Ralph was married to American heiress, Mildred Constance Sherman (1888–1961), the daughter of William Watts Sherman[4] and the former Sophia Augusta Brown, a granddaughter of the founder of Brown University in Providence, Rhode Island.

[5] Together, they were the parents of the following children:[6] Lord Camoys died at his American home, Stonor Lodge in Newport, Rhode Island (in the United States), on 3 August 1968.

1943), who married Julian Cotterell in 1965; and The Honourable John Stonor (1946–1994), who died unmarried.