Burchard of Avesnes d'Avesnes [11386] ²⁴

  General Notes:

http://www.hull.ac.uk/php/cssbct/cgi-bin/gedlkup.php/n=royal?royal10328
http://www.hull.ac.uk/php/cssbct/cgi-bin/gedlkup.php/n=royal?royal06967

https://en.wikipedia.org/wiki/Bouchard_IV_of_Avesnes

Burchard married Margaret II of Constantinople Countess of Flanders [11385] [MRIN: 5145], daughter of Baldwin I of Constantinople Emperor of Constantinople [7549] and Mary (Marie) of Champagne [7550]. (Margaret II of Constantinople Countess of Flanders [11385] was born on 2 Jun 1202 and died on 10 Feb 1280.)