John Osborne1
Child of John Osborne
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Effie Lilian Brennan1 
From before 1933, her married name became Johnson.1 After her marriage, Effie Lilian Brennan was styled as Baroness Selsdon on 18 January 1933. From 18 January 1933, her married name became Mitchell-Thomson.1
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Lt.-Col. Charles Brennan1
Child of Lt.-Col. Charles Brennan
- Effie Lilian Brennan1 d. 12 Apr 1956
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Walter Harte Loder Johnson1
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Phoebette Swithinbank1 
From 12 November 1936, her married name became Mitchell-Thomson.1 After her marriage, Phoebette Swithinbank was styled as Baroness Selsdon on 24 December 1938.
Children of Phoebette Swithinbank and Patrick William Malcolm Mitchell-Thomson, 2nd Baron Selsdon
- Malcolm McEacharn Mitchell-Thomson, 3rd Baron Selsdon+1 b. 27 Oct 1937
- Hon. Mary Gail Mitchell-Thomson+1 b. 11 Oct 1939
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Crossley Swithinbank1
He lived at Donnington Grove, Newbury, Berkshire, England.1
Child of Crossley Swithinbank
- Phoebette Swithinbank+1 d. 1991
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Hon. Mary Gail Mitchell-Thomson1
From 1963, her married name became O’Kelly.1
Children of Hon. Mary Gail Mitchell-Thomson and Patrick John Joseph O’Kelly
- Sebastian Patrick Sean O’Kelly1 b. 20 Aug 1964
- Shane O’Kelly1 b. 1968
- Niall O’Kelly1 b. 1970
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Patrick John Joseph O’Kelly1
He graduated with a Bachelor of Surgery (B.Ch.)1 He graduated with a Bachelor of Medicine (M.B.)1
Children of Patrick John Joseph O’Kelly and Hon. Mary Gail Mitchell-Thomson
- Sebastian Patrick Sean O’Kelly1 b. 20 Aug 1964
- Shane O’Kelly1 b. 1968
- Niall O’Kelly1 b. 1970
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Patrick O’Kelly1
Child of Patrick O’Kelly
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]
Sebastian Patrick Sean O’Kelly1
- [S37] BP2003 volume 3, page 3566. See link for full details for this source. Hereinafter cited as. [S37]