Nielsen Hayden genealogy
Family: Guy II de Châtillon / Mahaut of Brabant (F17125)
m. 16 Jan 1255
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Male
Guy II de Châtillon
Birth Abt 1230 Death 12 Mar 1289 Burial Marriage 16 Jan 1255 [1, 2] Naples, Campania, Italy [1, 2] 
Father Hugues de Châtillon | F15160 Group Sheet Mother Marie d'Avesnes | F15160 Group Sheet
Female
Mahaut of Brabant
Birth Abt 1224 Death 29 Sep 1288 Burial Cercamp Abbey, Artois, France 
Other Spouse Robert of France | F220 Marriage 14 Jun 1237 Father Henri II of Brabant | F4797 Group Sheet Mother Maria von Hohenstaufen | F4797 Group Sheet
Female
+ Beatrix de Châtillon
Birth Death 1304 St-Pol, France 
Burial Spouse Jean I de Brienne | F26310 Marriage
Male
+ Guy III de Châtillon
Birth 1265 Death 6 Apr 1317 Burial Abbey of Cercamp, Artois, France 
Spouse Marie de Bretagne | F13087 Marriage 22 Jul 1292
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Sources - [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler., says "abt 31 May 1254".
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler., says "abt 31 May 1254".