Thomas George 1st Viscount Southwell
1721 - 1780 (59 years)(
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- 1 Thomas George 1st Viscount Southwell [1] b. 4 May 1721 d. 29 Aug 1780
- Margaret Hamilton d. 18 Jul 1802
- 2 Thomas Arthur 2nd Viscount Southwell [1.1] b. 16 Apr 1742 d. 15 Feb 1796
- Sophia Maria Josepha Walsh d. 6 Jan 1796
- 3 Margaret Southwell [1.1.1] d. 26 Jan 1820
- Jenico (12Th Viscount Gormanston) Preston b. 4 Jan 1775 d. 10 Feb 1860
- 4 Edward Anthony John (13Th Viscount) Preston [1.1.1.1] b. 3 Jun 1796 d. 28 Sep 1876
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- 4 Robert Preston [1.1.1.2] b. 23 Jan 1802 d. 3 Mar 1868
- 4 Charles Preston [1.1.1.3] b. 28 Apr 1803 d. 2 Feb 1888
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- 4 Matilda Margaret Preston [1.1.1.4] b. 1 Jan 1810 d. 22 Dec 1888
- 4 Thomas Preston [1.1.1.5] b. 3 May 1817 d. 29 Aug 1903
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- 4 Edward Anthony John (13Th Viscount) Preston [1.1.1.1]
- 3 Paulina Southwell [1.1.2]
- 3 Thomas Anthony 3rd Viscount Southwell [1.1.3] b. 25 Feb 1777 d. Yes, date unknown
- 3 Charles Arthur Francis Southwell [1.1.4]
- 3 Margaret Southwell [1.1.1]
- 2 Robert Henry Southwell [1.2] b. Oct 1745 d. Yes, date unknown
- 2 Thomas Arthur 2nd Viscount Southwell [1.1]