Reginald Clixby Fitzwilliams1 
He was appointed Officer, Order of the British Empire (O.B.E.)2 He gained the rank of Captain in the Welsh Guards.1 He held the office of Deputy Lieutenant (D.L.)2 He held the office of Justice of the Peace (J.P.)2 He was appointed Fellow, Institute of Chartered Accountants (F.C.A.)2 He lived at Hazeldine, Healing, Lincolnshire, EnglandG.3
Child of Reginald Clixby Fitzwilliams
Child of Reginald Clixby Fitzwilliams and Pauline Cave
- Bronwyn Arreton Fitzwilliams2 b. 1946
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
- [S466] Notices, The Telegraph, London, UK. Hereinafter cited as The Telegraph.
- [S37] BP2003 volume 1, page 514. See link for full details for this source. Hereinafter cited as. [S37]
Pauline Cave1
From 13 February 1943, her married name became Fitzwilliams.1
Child of Pauline Cave and Reginald Clixby Fitzwilliams
- Bronwyn Arreton Fitzwilliams2 b. 1946
Rosemary Deborah Collingwood Fitzwilliams1
Her married name became Pope.1
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Noel Arthur Pope1
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Oliver Logie Fitzwilliams1 
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Jeannette Mary Fitzwilliams1
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Petronella Margaret Fitzwilliams1
From 22 July 1939, her married name became Collon.1
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Alexandre Auguste Gabriel Oscar Constant Collon1
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Francis Crompton Lloyd Fitzwilliams1 
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
Duncan Campbell Lloyd Fitzwilliams1 
He graduated with a Master of Surgery (Ch.M.)1 He graduated with a Doctor of Medicine (M.D.)1 He was appointed Fellow, Royal College of Surgeons (F.R.C.S.)1 He was appointed Companion, Order of St. Michael and St. George (C.M.G.)2
Children of Duncan Campbell Lloyd Fitzwilliams
- Ileana Barbara Fitzwilliams2
- Robert Campbell Lloyd Fitzwilliams+1 b. 9 Feb 1909, d. Jun 2001
- Jeannette Mary Fitzwilliams2 b. 1913, d. 2010
- [S1322] David Arathoon, “re: Acheson Family and Campbell Family,” e-mail message to British and European Nobility Register, 8 April 2005 – 14 July 2006. Hereinafter cited as “re: Acheson Family and Campbell Family.”
- [S5040] Richard Fitzwilliams, “re: Fitzwilliams Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 14 December 2010. Hereinafter cited as “re: Fitzwilliams Family.”