Nielsen Hayden genealogy
Family: William Douglas / Margaret Hay (F15871)
m. Abt 1414
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Male
William Douglas
Birth 24 Feb 1398 Tantallon Castle, East Lothian, Scotland 
Death Oct 1437 Burial Marriage Abt 1414 [1, 2] Yester Castle, Gifford, East Lothian, Scotland [1, 2] Father George Douglas | F15873 Group Sheet Mother Mary Stewart | F15873 Group Sheet
Female
Margaret Hay
Birth Abt 1400 Death Aft 22 Apr 1484 Burial Father William Hay | F15872 Group Sheet Mother Elizabeth | F15872 Group Sheet
Male
+ George Douglas
Birth Death 12 Mar 1463 Burial Spouse Isabel Sibbald | F17881 Marriage Bef 1446
Female
+ Helen Douglas
Birth Abt 1436 Death Aft 20 Nov 1486 Burial Spouse William Graham | F15870 Marriage Bef 1460
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Sources - [S1480] The Ancestry of Charles II, King of England: A Medieval Heritage by Charles M. Hansen and Neil D. Thompson. Saline, Michigan: McNaughton and Gunn, 2012.
- [S2476] Adrian Benjamin Burke, "The Livingston Ancestry of the Duncanson Sisters of New Netherland." The Genealogist 27:28, 27:163, 2013; 28:58, 2014., says 6 Jan 1415.
- [S1480] The Ancestry of Charles II, King of England: A Medieval Heritage by Charles M. Hansen and Neil D. Thompson. Saline, Michigan: McNaughton and Gunn, 2012.