William (3rd Earl March & 4th Duke of Queensberry) Douglas
1725 - 1810 (85 years)(
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- 1 William (3rd Earl March & 4th Duke of Queensberry) Douglas [1] b. 1724-1725 d. 1810
- Fagniani b. Abt 1725 d. Yes, date unknown
- 2 Maria Fagniani [1.1] d. 2 Mar 1856
- Francis (3rd Marquess of Hertford) Seymour-Ingram b. 11 Mar 1777 d. Yes, date unknown
- 3 Richard (4th Marquess of Hertford) Seymour-Ingram [1.1.1] b. 22 Feb 1800 d. 25 Aug 1870
- 3 Henry Seymour-Ingram [1.1.2] b. 10 Jan 1805 d. 10 Jan 1805
- 3 Frances Maria Seymour-Ingram [1.1.3]
- 3 Richard (4th Marquess of Hertford) Seymour-Ingram [1.1.1]
- 2 Maria Fagniani [1.1]