Eustace I de Boulogne Ct de Boulogne

Eustace I de Boulogne was born in 1004.  Eustace I de Boulogne's father was Enricule 'le Petit' Boulogne and his mother was Adeline Cts de Boulogne.  His paternal grandfather was Arnoul Boulogne Ct de Boulogne. He had a sister named Rosetta.  He was the younger of the two children.  He died at the age of 43 in 1047.

They had two sons and a daughter, named Lambert de Lens, Eustace II de Boulogne and Ida.