Adelaide of Holland
Heiress of the county of Holland
Countess consort of Hainault (1246 - 1257)
Dowager Countess (1257 - 1284)
Regent of Holland and Zealand (1258 - 1263)
Also called Aleid or Aleidis
Born (1231) - Died (1284)

Father - Floris IV of Holland
Mother - Matilda of Brabant

Adelaide married (Oct 9, 1246) Jean I of Avesnes
Children :

• Jean II of Avesnes
• Baldwin of Avesnes (1249)
• Burchard of Avesnes (1251 - 1296) Bishop of Metz (1282 - 1296)
• Guy of Avesnes (1253 - 1317) Bishop of Utrecht (1301 - 1317)
• William of Avesnes (1254 - 1296) Bishop of Kamerijk (1286 - 1296)
• Johanna of Avesnes (c1256 - 1301) nun and Abbess of Flines (1276 - 1301)