Baldwin III Count of Hainault
Baldwin III Count of was born in 1088 in Hainaut,  Flanders.  He died at the age of 32 in 1120.

 Yolande Jolante
Yolande was born in 1090 in Wassenberg, Rheinland, Prussia.

 Ida Gertrude Hainault
Ida Gertrude was born in 1105 in Hainaut, Flanders.  She died at the age of 89 in 1194.

 Baldwin IV of Mons Count of Flanders
He died in 1171.