Guy I of Ponthieu was born sometime in the mid- to late 1020s and died 13 October 1100. He succeeded his brother Enguerrand as Count of Ponthieu. Wikipedia
Died: October 13, 1100, Abbeville, France
Great grandchildren: Guy II of Ponthieu, Clemence de Ponthieu, Ela of Burgundy, and more
Children: Agnes, Countess of Ponthieu
Parents: Hugh II, Count of Ponthieu
Great-grandparent: Hugh I, Count of Ponthieu
Grandparent: Enguerrand I, Count of Ponthieu
Grandchild: William III, Count of Ponthieu