Nielsen Hayden genealogy
Family: William de Fiennes / Joan de Say (F16722)
m. Bef 1356
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Male
William de Fiennes
Birth of Herstmonceux, Sussex, England 
Death 2 Dec 1359 Overseas 
Burial Marriage Bef 1356 [1] Father John de Fiennes | F16723 Group Sheet Mother Maud de Monceux | F16723 Group Sheet
Female
Joan de Say
Birth Death 29 Jun 1378 Burial Father Geoffrey de Say | F9414 Group Sheet Mother Maud de Beauchamp | F9414 Group Sheet
Male
+ William Fiennes
Birth of Herstmonceux, Sussex, England 
Death 18 Jan 1402 Burial Herstmonceux, Sussex, England 
Spouse Elizabeth Batisford | F16719 Marriage Bef 23 Apr 1385
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.