Nielsen Hayden genealogy
Family: Henry de Percy / Isabel de Brus (F1381)
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Male
Henry de Percy
Birth of Petworth, Sussex, England 
Death Bef 29 Sep 1198 Burial Marriage Father Joscelin of Louvain | F1395 Group Sheet Mother Agnes de Percy | F1395 Group Sheet
Female
Isabel de Brus
Birth of Skelton, Yorkshire, England Death Aft 1230 Burial Other Spouse Roger Mauduit | F3029 Marriage Father Adam II de Brus | F6405 Group Sheet Mother Juetta de Arches | F6405 Group Sheet
Male
+ William de Percy
Birth Abt 1193 of Topcliffe, Yorkshire, England Death Bef 28 Jul 1245 Burial Sallay Abbey, Yorkshire, England Spouse Joan Briwerre | F1336 Marriage Abt 1226 Spouse Ellen de Balliol | F1326 Marriage Abt 1233