John St. John Frederick1 
He gained the rank of Captain in the Inniskilling Dragoons.1
Baron unknown de Reuter1
Child of Baron unknown de Reuter
- Mary Theresa Caroline Alice de Reuter, Baroness von Donop2 d. 22 Feb 1895
Mary Theresa Caroline Alice de Reuter, Baroness von Donop1 
From 2 July 1890, her married name became Frederick.
Martha Frederick1
Her married name became Steuart.
Robert Steuart of Ballechin1
Child of Robert Steuart of Ballechin
Robert Steuart1
Augusta Frederick1
Her married name became Scott.
H. Scott1
- [S37] BP2003 volume 1, page 1490. See link for full details for this source. Hereinafter cited as. [S37]
Lucy Frederick1
From 20 September 1806, her married name became Young.
Children of Lucy Frederick and Sir William Young, 1st Bt.
- Anna Young2 d. 7 Jun 1882
- Augusta Maria Young2 d. 29 Nov 1899
- unknown daughter Young2
- John Young, 1st Baron Lisgar of Lisgar and Bailieborough2 b. 31 Aug 1807, d. 6 Oct 1876
- Thomas Young+2 b. Jan 1810, d. 1846
- Charles Young2 b. 3 Jun 1811, d. 18 Mar 1838
- William Young2 b. Jun 1817, d. Sep 1850
- Helenus Edward Young2 b. Jun 1822, d. Jan 1851
Sir William Young, 1st Bt.1 
He was Director of the Honourable East India Company.3 He was created 1st Baronet Young, of Bailieborough Castle, County Cavan [U.K.] on 28 August 1821.1
Children of Sir William Young, 1st Bt. and Lucy Frederick
- Anna Young3 d. 7 Jun 1882
- Augusta Maria Young3 d. 29 Nov 1899
- unknown daughter Young3
- John Young, 1st Baron Lisgar of Lisgar and Bailieborough3 b. 31 Aug 1807, d. 6 Oct 1876
- Thomas Young+3 b. Jan 1810, d. 1846
- Charles Young3 b. 3 Jun 1811, d. 18 Mar 1838
- William Young3 b. Jun 1817, d. Sep 1850
- Helenus Edward Young3 b. Jun 1822, d. Jan 1851
