James Tregarthen1 
Children of James Tregarthen and Susan Bevan Coulson
- John Coulson Tregarthen1 b. 1854
- William Coulson Tregarthen1 b. 1856, d. 1942
- Catherine Coulson Tregarthen1 b. 1859
- Susan Coulson Tregarthen1 b. 1862
- [S4567] Bill Norton, “re: Pitman Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 6 April 2010 and 19 April 2011. Hereinafter cited as “re: Pitman Family.”
Humphrey Colquhoun1
He lived at Lettyr, ScotlandG.1
- [S37] BP2003 volume 1, page 860. See link for full details for this source. Hereinafter cited as. [S37]
Stewart W. Timmerman1
Child of Stewart W. Timmerman
Susan Timmerman1
From 1978, her married name became Colquhoun.1
Child of Susan Timmerman and Sir Malcolm Rory Colquhoun of Luss, 9th Bt.
- Patrick John Colquhoun+2 b. 17 Dec 1980
Patrick John Colquhoun1
Children of Patrick John Colquhoun and Charlotte J. Murphy
- Arthur Stewart Colquhoun3 b. 19 Jul 2012
- Rory Ivar Colquhoun4 b. 28 Mar 2014
- [S37] BP2003 volume 1, page 860. 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.
- [S466] Notices, The Telegraph, London, UK. Hereinafter cited as The Telegraph.
Archibald Colquhoun1
- [S37] BP2003 volume 1, page 860. See link for full details for this source. Hereinafter cited as. [S37]
Katharine A. H. Mears1
From 6 October 1989, her married name became Colquhoun.1
Child of Katharine A. H. Mears and Sir Malcolm Rory Colquhoun of Luss, 9th Bt.
- Georgina Iona Helena Colquhoun2 b. 4 Feb 1993
Georgina Iona Helena Colquhoun1
