Guy I, Count of Ponthieu

[3] Enguerrand's and Guy's unnamed sister was married to William of Talou, son of Richard II, Duke of Normandy.

This combined force moved down the Seine toward Rouen, while Henry's brother Eudes "led" a second army, along with Guy and Count Rainald of Clairmont.

In 1064, Harold Godwinson, the Earl of Wessex, was shipwrecked on the shores of Ponthieu and captured by Count Guy who took him to his castle of Beaurain on the river Canche, as the Bayeux Tapestry relates: hic apprehendit wido Haroldum et duxit em ad Belrem et ibi eum tenuit ("Here Guy seized Harold and led him to Beaurain and held him there").

In 1066, Harold accepted the crown of England upon the death of Edward the Confessor, thus precipitating the war that resulted in the Norman Conquest.

According to one interpretation of The Carmen de Hastingae Proelio, Hugh, another of Guy's brothers, was a participant in the Battle of Hastings, and had a hand in the slaying of Harold.

[6] They had: Guy was portrayed by Bernard Hepton in the two-part BBC TV play Conquest (1966), part of the series Theatre 625.