Ian R. Firth1
Child of Ian R. Firth and Christine A. Cole
- Alexandra Mary Firth+1 b. Dec 1979
- [S466] Notices, The Telegraph, London, UK. Hereinafter cited as The Telegraph.
Angela Beryl Hoare1 
Her married name became Frisby.3 From 31 October 1946, her married name became Guinness.
Child of Angela Beryl Hoare and Lt.-Col. Lionel Claud Frisby
- Simon Rollo Frisby+3 b. 1933, d. 13 Jan 2020
Child of Angela Beryl Hoare and Captain Eustace John Guinness
- Timothy Whitmore Newton Guinness+2 b. 20 Jun 1947
- [S37] BP2003 volume 2, page 1700. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S339] Descendants of William the Conqueror, online http://www.william1.co.uk/. Hereinafter cited as Descendants of William the Conqueror.
Timothy Whitmore Newton Guinness1
He was educated at Eton College, Windsor, Berkshire, EnglandG.1 He graduated from Magdalene College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Bachelor of Science (B.Sc.)1 He graduated from Massachusetts Institute of Technology, Cambridge, Massachusetts, U.S.A.G, with a Masterr of Science (M.Sc.)1 He was an investment director of Guinness Mahon & Company between 1982 and 1987.1 He was chairman of Investec Guinness Flight in 1998.1 He lived in 2003 at 2 Gresham Street, London, EnglandG.1
Children of Timothy Whitmore Newton Guinness and Beverly Anne Mills
Beverly Anne Mills1
From 6 June 1974, her married name became Guinness.
Children of Beverly Anne Mills and Timothy Whitmore Newton Guinness
Edward Benjamin Newton Guinness1
Children of Edward Benjamin Newton Guinness and Nancy Cadogan
- Arthur Frith Newton Guinness3 b. 2008
- Benjamin Rocky Newton Guinness3 b. 2 Jun 2010
- Rose Elizabeth Beatrix Guinness4 b. 20 Nov 2012
- [S37] BP2003 volume 2, page 1700. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S203] Announcements, The Times, London, U.K., 16 September 2010. Hereinafter cited as The Times.
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Harry Guinness1
- [S37] BP2003 volume 2, page 1700. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S3537] Anonymous, “re: Ponsonby Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 January 2009. Hereinafter cited as “re: Ponsonby Family.”
Mary Elizabeth Guinness1
Catherine Alice Guinness1
Her married name became de Laszlo.3
Children of Catherine Alice Guinness and William Patrick de Laszlo
- Alice Florence de Laszlo3 b. 25 Aug 2007
- Walter Henry Patrick de Laszlo3 b. 30 Oct 2009
- [S37] BP2003 volume 2, page 1700. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Colonel Dennys Robert Guinness1
He gained the rank of Colonel in the Royal Engineers.1
Children of Colonel Dennys Robert Guinness and Elizabeth Howland
- Major Dennys Key Guinness2 b. 1933, d. 5 Jul 1978
- Ann Guinness2 b. 1935
