Elizabeth Catherine Williams1 
From 29 July 1935, her married name became Cayzer. After her marriage, Elizabeth Catherine Williams was styled as Baroness Cayzer.
Children of Elizabeth Catherine Williams and William Nicholas Cayzer, Baron Cayzer
- Hon. Nichola Cayzer+2 b. 27 May 1937, d. 23 Feb 2000
- Hon. Elizabeth Cayzer2 b. 16 Jan 1946
Hon. Nichola Cayzer1 
From 15 September 1956, her married name became Colvin.
Children of Hon. Nichola Cayzer and Michael Keith Beale Colvin
- Amanda Colvin+2 b. 12 Jun 1957
- Arabella Nichola Colvin+2 b. 11 Apr 1960
- James Michael Beale Cayzer-Colvin+2 b. 1 Apr 1965
Admiral Sir Henry John Studholme Brownrigg1
He was appointed Companion, Order of the Bath (C.B.)1 He was awarded the Distinguished Service Order (D.S.O.)1 Admiral Sir Henry John Studholme Brownrigg usually went by his middle name of Studholme.1 He was appointed Knight Commander, Order of the British Empire (K.B.E.)1
Child of Admiral Sir Henry John Studholme Brownrigg
- Lt.-Cdr. John Studholme Brownrigg+1 d. 1971
- [S37] BP2003 volume 1, page 738. See link for full details for this source. Hereinafter cited as. [S37]
Michael Keith Beale Colvin1 
Michael Keith Beale Colvin was born on 27 September 1932.3 He was the son of Captain Ivan Beale Colvin and Joyce Frances Arbuthnot.4,3 He married Hon. Nichola Cayzer, daughter of William Nicholas Cayzer, Baron Cayzer and Elizabeth Catherine Williams, on 15 September 1956.1 He died on 23 February 2000 at age 67 at Tangley House, Andover, Hampshire, EnglandG, with his wife in a fire at their house.1
He gained the rank of Lieutenant in the Grenadier Guards.1 He held the office of Member of Parliament (M.P.)1
Children of Michael Keith Beale Colvin and Hon. Nichola Cayzer
- Amanda Colvin+4 b. 12 Jun 1957
- Arabella Nichola Colvin+4 b. 11 Apr 1960
- James Michael Beale Cayzer-Colvin+4 b. 1 Apr 1965
- [S37] BP2003 volume 1, page 737. See link for full details for this source. Hereinafter cited as. [S37]
- [S300] Michael Rhodes, “re: Ernest Fawbert Collection,” e-mail message to BENR, 8 February. Hereinafter cited as “re: Ernest Fawbert Collection.”
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S37] BP2003. [S37]
James Michael Beale Cayzer-Colvin1
He was given the name of James Michael Beale Colvin at birth.1 He was an investment banker with Rathbone Brothers.3
Children of James Michael Beale Cayzer-Colvin and Esther Anne Mary Tree
- Molly Isabella Elizabeth Cayzer-Colvin2 b. 30 Sep 1995
- Lily Georgia Daphne Cayzer-Colvin2 b. 8 Apr 1999
- [S37] BP2003 volume 1, page 738. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
Iris Sarah Gascoyne-Cecil1,2
- [S37] BP2003 volume 1, page 739. See link for full details for this source. Hereinafter cited as. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
Molly Isabella Elizabeth Cayzer-Colvin1
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
- [S37] BP2003 See link for full details for this source. Hereinafter cited as. [S37]
Lily Georgia Daphne Cayzer-Colvin1
Amanda Colvin1
From 1985, her married name became Ponsonby. She was appointed Member, Order of the British Empire (M.B.E.) in 1990.1
Children of Amanda Colvin and Rupert Spencer Ponsonby
- Emily Mary Ponsonby2 b. 1990
- Eleanor Rose Ponsonby2 b. 1993
- George Edward Michael Ponsonby2 b. 1996
