Baudouin III De Hainault
Baudouin III was born about 1080 in Mons, Hainault, Belgium.

 Yolande Von Wassenberg
Yolande was born about 1088 in Germany.

 Richilde De Hainault
Richilde was born about 1106 in Hainault, Flanders, Belgium.

 Baudouin IV De Hainault
Baudouin IV was born in 1108 in Mons, Hainault, Flanders.  He died at the age of 63 on November 8th, 1171.