Geert Holger Sonderhoff1
He lived in 2003 at 316 Stevens Drive, West Vancouver, British Columbia, CanadaG.1
Children of Geert Holger Sonderhoff and Diana Karin Arbuthnot
- Terence Sven Sonderhoff1 b. 17 Sep 1965
- Stefan Andrew Sonderhoff1 b. 10 Sep 1967
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [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.”
Karl Sonderhoff1
Child of Karl Sonderhoff
- Geert Holger Sonderhoff+1 b. 1 May 1933
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [S37]
Terence Sven Sonderhoff1
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [S37]
Stefan Andrew Sonderhoff1
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [S37]
Commander Bernard Kieran Charles Arbuthnot1 

Commander Bernard Kieran Charles Arbuthnot was born on 8 November 1909.1 He was the son of Major John Bernard Arbuthnot and Olive Blake.1 He married Rosemary Harold Thompson, daughter of Lt.-Col. Harold Thompson, on 15 April 1939.1 He died on 14 September 1975 at age 65.1
He was educated at Eton College, Windsor, Berkshire, EnglandG.2 He gained the rank of Commander in the Royal Navy.1 He was awarded the Distinguished Service Cross (D.S.C.)1 He lived in 1975 at Myrtle Grove, Youghal, County Cork, IrelandG.3
Children of Commander Bernard Kieran Charles Arbuthnot and Rosemary Harold Thompson
- Shirley Arbuthnot+1 b. 9 Mar 1949
- Penelope Anne Arbuthnot+1 b. 23 Dec 1953
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [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.”
- [S47] BIFR1976 Blake, page 120. See link for full details for this source. Hereinafter cited as. [S47]
Ian David Drew-Smythe1 
Ian David Drew-Smythe usually went by his middle name of David.1
Children of Ian David Drew-Smythe
Janet Diana Drew-Smythe1
- [S1120] David Drew-Smythe, “re: Richard David Drew-Smythe,” e-mail message to British and European Nobility Register, 6 July 2004. Hereinafter cited as “re: Richard David Drew-Smythe.”
John Roderick Drew-Smythe1
- [S1120] David Drew-Smythe, “re: Richard David Drew-Smythe,” e-mail message to British and European Nobility Register, 6 July 2004. Hereinafter cited as “re: Richard David Drew-Smythe.”
Rosemary Harold Thompson1 
From 15 April 1939, her married name became Arbuthnot.1
Children of Rosemary Harold Thompson and Commander Bernard Kieran Charles Arbuthnot
- Shirley Arbuthnot+1 b. 9 Mar 1949
- Penelope Anne Arbuthnot+1 b. 23 Dec 1953
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [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.”
Lt.-Col. Harold Thompson1
Child of Lt.-Col. Harold Thompson
- Rosemary Harold Thompson+1 d. 29 Aug 1978
- [S37] BP2003 volume 1, page 120. See link for full details for this source. Hereinafter cited as. [S37]