Nielsen Hayden genealogy
Family: John d'Avesnes / Adelaide of Holland (F12991)
m. 9 Oct 1246-
Male
John d'Avesnes
Birth Apr 1218 Houffalize, Luxembourg (now Belgium) 
Death 24 Dec 1257 Valenciennes, Nord-Pas-de-Calais, France Burial Marriage 9 Oct 1246 [1] Father Bouchard IV d'Avesnes | F10601 Group Sheet Mother Margaret II of Flanders | F10601 Group Sheet
Female
Adelaide of Holland
Birth Abt 1230 Death Between 1 Mar 1284 and 7 Apr 1284 Burial Father Floris IV of Holland | F13011 Group Sheet Mother Machteld of Brabant | F13011 Group Sheet
Male
+ John II of Hainault
Birth 1247 Death 22 Aug 1304 Burial Church of the Franciscans, Valenciennes, Nord-Pas-de-Calais, France Spouse Philippa of Luxembourg | F12778 Marriage
Male
+ Jean II d'Avesnes
Birth 1247 Death 11 Sep 1304 Burial Valenciennes, Nord-Pas-de-Calais, France Spouse Philippine de Luxemburg | F13080 Marriage Between 1265 and 1270
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Sources - [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.
- [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.