Bouchard IV d' Avesnes ^{1 2}

  Noted events in his life were:

• He was a Count of Avesnes.

• He was a Seigneur de Beaumont.

Bouchard married Margaret II of Flanders, daughter of Baldwin I of Constantinople and Marie of Champagne, before 23 Jul 1212. The marriage ended in divorce in 1221. (Margaret II of Flanders was born in 1202 and died in 1278.)