Enguerrand I was the son of Hugh I of Ponthieu and Gisela, daughter of Hugh Capet.[1]
Enguerrand married Adelaide, daughter of Arnulf, Count of Holland, they had:
With his second wife, Adelvie,[3] widow of Count Arnold II of Boulogne,[a] they had:
Enguerrand married Berta, daughter of Geurenfrid.[3]
Enguerrand died around 1045[3] "at a great age."[citation needed]