Thomas Barnewall, 13th Baron Trimlestown1 
He was appointed Knight, Sovereign Military Order of Malta.1 In 1795 his grandfather’s attainder was reversed.1 He succeeded as the 13th Baron Trimlestown, of Trimlestown, co. Meath [I., 1461] in 1795.1
Anna (?)1 
Her married name became Barnewall.
- [S37] BP2003 volume 3, page 3939. See link for full details for this source. Hereinafter cited as. [S37]
John Barnewall1 
Lady unknown daughter Waters1
From 1740, her married name became Barnewall.
- [S37] BP2003 volume 3, page 3939. See link for full details for this source. Hereinafter cited as. [S37]
Ethel Sealby Ismay1 
Child of Ethel Sealby Ismay and Geoffrey Drage
- Commander Charles Hardinge Drage+2 b. 1897, d. 1983
- [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.”
- [S7274] Archibald Fraser, “re: Fraser Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 23 September 2014. Hereinafter cited as “re: Fraser Family.”
Charles Bower Ismay1

- [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.”
Ada Ismay1 
- [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.”
Dora Ismay1 
- [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.”
Joseph d’Auguin1
Child of Joseph d’Auguin
- Martha Henrietta d‘Auguin+2 d. May 1782
Martha Henrietta d’Auguin1 
From 1 November 1768, her married name became Barnewall. After her marriage, Martha Henrietta d’Auguin was styled as Baroness Trimlestown on 24 December 1769.
Children of Martha Henrietta d’Auguin and Nicholas Barnewall, 14th Baron Trimlestown
- Hon. Rosalie Barnewall+2 d. 2 Feb 1864
- unknown Barnewall2 b. b 1773
- John Thomas Barnewall, 15th Baron Trimlestown+2 b. 29 Jan 1773, d. 7 Oct 1839