I Eustache
I was born about 1004 in Boulogne, Lorraine, France.  He died in 1049.

 Mahaut De Louvain
Mahaut was born about 0984 in Louvain, Brabant, Belgium.

 Count of Lens Lambert
Count of Lens was born about 1020 in Boulogne, Flandres.  He died in 1054 in Bataille De Lille, Flandres.

 Ida De Boulogne
Ida was born about 1028.

 II Eustache
II was born about 1030.

 Gerberge De Boulogne