Eustace de Boulogne 
Eustace was born before 1031. Eustace's father was Comte Baudouin de Boulogne and his mother was Adeline de Hollande. His maternal grandfather was Comte Arbulph de Hollande. He was an only child. He died about 1049.General Notes
Children of Eustace I, Comte de Boulogne and Maud de Louvain
* Lambert II de Boulogne, Comte de Lens+ d. 1054
* Eustace II, Comte de Boulogne+ b. b 1047, d. c 1080
