Baldwin II Count of Hainault
Baldwin II Count of was born in 1056.  He died at the age of 42 in 1098.

 Ida of Louvain
Ida of was born in 1065.  She died at the age of 74 in 1139.

 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.