Maybe one of these?
Roayal Ancestry D. Richardson Vol. I page 464
EUSTACHE I, son and heir of Baldwin, Count of Boulogne, by his wife, Adelvie de Gant, born about 995. He married MATHILDE (or MAHAUT OF LOUVAIN, daughter of Lambert I, Count of Louvain, by Gerberge, daughter of Charles, Duke of Lower Lorraine. She was born 993.
EUSTACHE II, Count of Boulogne, Count of Lens. He married (1st) before 1049 GODA OF ENGLAND, widow of Dreux, Count of Vexin (died 1035), and daughter of Aethelred II, King of England, by Emma, daughter of Richard I, Duke of Normandy. Their issue, if any, is uncertain. He married (2nd) [SAINT] IDA OF VERDUN. They had four sons,
Eustache III, Count of Boulogne and Lens. He married MARY OF SCOTLAND, daughter of Malcolm III, King of Scots; Godfrey [Duke of Lower Lorraine, Defender or Advocate of the Holy Sepulchtre]; Baldwin I, King of Jerusalem; and William, and one daughter, Agnes.