Peter George Grenfell, 2nd Baron St. Just 
He was educated at Harrow School, Harrow, London, England.3 He succeeded as the 2nd Baron St. Just, of Saint Just in Penwith, co. Cornwall [U.K., 1935] on 26 November 1941.3 He gained the rank of Lieutenant in the King’s Royal Rifle Corps.1 He fought in the Second World War.3 On his death, his title became extinct.
Child of Peter George Grenfell, 2nd Baron St. Just and Leslie Nast
- Hon. Laura Claire Grenfell2 b. 17 Jul 1950
Children of Peter George Grenfell, 2nd Baron St. Just and Maria Britneva
- Hon. Katherine Grenfell+2 b. 23 May 1957
- Hon. Natasha Jeannine Mary Grenfell2 b. 15 Jan 1959
- [S37] BP2003 volume 2, page 1658. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S34] BP1970 page 2358. See link for full details for this source. Hereinafter cited as. [S34]
- [S379] Leigh Rayment’s Peerages, online http://www.leighrayment.com. Hereinafter cited as Leigh Rayment’s Peerages.
Maud Alethea Louisa Grenfell1 
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 102. Hereinafter cited as The New Extinct Peerage.
- [S37] BP2003 volume 2, page 1658. See link for full details for this source. Hereinafter cited as. [S37]
Leslie Nast
After her marriage, Leslie Nast was styled as Baroness St. Just on 1 June 1949. From 1 June 1949, her married name became Grenfell. From 30 June 1955, her married name became Bonham Carter.3
Child of Leslie Nast and Peter George Grenfell, 2nd Baron St. Just
- Hon. Laura Claire Grenfell4 b. 17 Jul 1950
Children of Leslie Nast and Mark Raymond Bonham Carter, Baron Bonham-Carter
- Jane Mary Bonham Carter, Baroness Bonham-Carter of Yarnbury b. 20 Oct 1957
- Hon. Virginia Leslie Bonham Carter+4 b. 27 Aug 1959
- Hon. Elizabeth Cressida Bonham Carter2 b. 1 Mar 1961
- [S34] BP1970 page 2358. See link for full details for this source. Hereinafter cited as. [S34]
- [S37] BP2003 volume 2, page 3038. See link for full details for this source. Hereinafter cited as. [S37]
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
- [S37] BP2003. [S37]
Condé Montrose Nast1 
He was educated in 1894 at Georgetown University, Washington, D.C., U.S.A.G.1 He was founder of Vanity Fair and Vogue magazines.1 He lived at New York City, New York, U.S.A.G.1
Children of Condé Montrose Nast and Jeanne Clarisse Coudert
Child of Condé Montrose Nast and Leslie Foster
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
Leslie Foster1 
From 1928, her married name became Nast.1 Her married name became Benson.1
Child of Leslie Foster and Condé Montrose Nast
Child of Leslie Foster and Lt.-Col. Sir Reginald Lindsay Benson
- David Holford Benson+ b. 26 Feb 1938, d. 17 Oct 2023
Hon. Laura Claire Grenfell1
Maria Britneva1 
She was an actress, including several Tennessee Williams plays.2 From 25 July 1956, her married name became Grenfell. After her marriage, Maria Britneva was styled as Baroness St. Just on 25 July 1956. She was literary executrix for Tennessee Williams.2 She wrote the book Five O’Clock Angel, published 1990.2
Children of Maria Britneva and Peter George Grenfell, 2nd Baron St. Just
- Hon. Katherine Grenfell+3 b. 23 May 1957
- Hon. Natasha Jeannine Mary Grenfell3 b. 15 Jan 1959
Alexander Britnev1
Child of Alexander Britnev
- Maria Britneva+2 b. 2 Jul 1921, d. 15 Feb 1994
Lady Victoria Frederica Wilhelmina Georgina Seymour1 
Her married name became de Trafford.
Child of Lady Victoria Frederica Wilhelmina Georgina Seymour and Lt.-Col. Charles Alan Cathcart de Trafford
Hon. Natasha Jeannine Mary Grenfell1
