*Marguerite Comtesse de Flanders
born 2 June 1202 Constantinople, Byzantium
died 10 February 1280

father:
*Baudouin IX (VI) Count of Flanders & Hainault
born July 1171 Hainault, Belgium
died 11 June 1205

mother:
*Marie de Champagne
born about 1171 Champagne, France
died 29 August 1204
married 1186

siblings:
Joanna de Flanders

spouse:
*Bouchard d'Avesnes
born about 1182 Oizy, Namur, Belgium
died 1244 (beheaded)
married March 1216 Etraeungt, Nord, France

children:
*Jean I de Hainault d'Avesnes Count in Flanders
born 1 May 1218 Etraeungt, Nord, France or Houffalize, Luxembourg
died 24 December 1257 Valenciennes, Nord, France
Baudouin d'Avesnes born about 1218 Houffalize, Luxenbourg died before 1219

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com