The barony of Camoys was created twice. From 26 November 1313 to 1 April 1335 Ralph de Camoys (d.1336) was summoned to Parliament by writ, and is thereby held to have become Baron Camoys of the first creation. Ralph de Camoys (d.1336) married firstly, Margaret de Brewes, daughter of William de Brewes, 1st Lord Brewes (d.1291), and secondly, Elizabeth le Despenser, daughter of Hugh le Despenser, 1st Earl of Winchester (executed 27 October 1326).
By his first wife, Margaret de Brewes, daughter of William de Braose, 1st Baron Braose, Ralph de Camoys (d.1336) had a son, Thomas de Camoys, 2nd Baron Camoys, (d.1372). Thomas married a wife named Margaret, and by her had a son, Ralph Camoys. This first creation of the barony expired with the death on 11 April 1372 without male heirs of Thomas de Camoys, 2nd Baron Camoys, his son, Ralph having predeceased him.
The heir of Thomas de Camoys (d.1372) was his nephew, another Thomas de Camoys (d.1421), who was the grandson of Ralph de Camoys (d.1336) by his second wife, Elizabeth le Despenser, and the son of Sir John Camoys by his second wife, Elizabeth le Latimer, daughter of William le Latimer, 3rd Lord Latimer. From 20 August 1383 to 26 February 1421 Thomas de Camoys (d.1421) was summoned to Parliament by writ, by which he is held to have become Baron Camoys of the second creation.
Thomas de Camoys (d.1421) was twice married, firstly to Elizabeth Louches, the daughter of William Louches of great Milton and Chiselhampton, and secondly to Elizabeth Mortimer, daughter of Edmund Mortimer, 3rd Earl of March, and widow of Henry 'Hotspur' Percy. By his first wife, Elizabeth Louches, he had a son, Sir Richard Camoys, who married Joan Poynings, and by her had three sons, John, Ralph and Hugh, and two daughters, Margaret and Eleanor. Sir Richard Camoys predeceased his father, dying sometime before 24 June 1416.
The barony was inherited by Sir Richard's third son, Hugh de Camoys, 2nd Baron Camoys, who died a minor and a ward of the King on 18 June 1426. On his death the barony fell into abeyance between his sisters, Margaret and Eleanor. It remained in abeyance for 413 years until 1839, when Thomas Stonor, 3rd Baron Camoys successfully claimed the barony as a descendant of Margaret de Camoys. He had previously represented Oxford in the House of Commons and later held office as a Lord-in-Waiting (government whip in the House of Lords) in the Liberal administrations of Lord John Russell, Lord Palmerston and William Ewart Gladstone as well as in the coalition government of Lord Aberdeen. He was succeeded by his grandson, Francis Stonor, 4th Baron Camoys, who served as a Lord-in-Waiting in the Liberal governments of William Gladstone and Lord Rosebery. The title is currently held by his great-grandson, Thomas Stonor, 7th Baron Camoys, who succeeded his father in 1976. He served as Lord Chamberlain of the Household between 1998 and 2000.
Barons Camoys, First creation (1313)
- Ralph de Camoys, 1st Baron Camoys (d. 1336)
- Thomas de Camoys, 2nd Baron Camoys (d. 1372)
Barons Camoys, Second creation (1383)
- Thomas de Camoys, 1st Baron Camoys (d. 1419/21)
- Hugh de Camoys, 2nd Baron Camoys (1413–1426) (title in abeyance from 1426)
- Thomas Stonor, 3rd Baron Camoys (1797–1881) (abeyance terminanted 1839)
- Francis Stonor, 4th Baron Camoys (1856–1897)
- Ralph Stonor, 5th Baron Camoys (1884–1968)
- Sherman Stonor, 6th Baron Camoys (1913–1976)
- Thomas Stonor, 7th Baron Camoys (b. 1940)
The heir apparent is the present holder's son, the Hon. Ralph William Stonor (b. 1974)
- Richardson I 2011, p. 395.
- Richardson II 2011, pp. 64–7.
- Cokayne 1912, p. 506; Leland 2004; Richardson I 2011, p. 395.
- Richardson I 2011, pp. 394–8.
- Cokayne 1912, p. 506; Richardson I 2011, p. 398.
- Richardson I 2011, pp. 398–9.
- Richardson I 2011, p. 400.
- Richardson I 2011, p. 400.
- Cokayne 1912, p. 508.
- Cokayne 1912, pp. 509–10.
- Cokayne, George Edward (1912). The Complete Peerage, edited by H.A. Doubleday. II. London: St. Catherine Press. pp. 506–10.
- Leland, John L. (2004). Camoys, Thomas, Baron Camoys (c.1350-1420/21). Oxford Dictionary of National Biography. Retrieved 26 September 2012.
- Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham. I (2nd ed.). Salt Lake City. ISBN 1449966373