From the Foundation for Medieval Genealogy:

http://fmg.ac/Projects/MedLands/ANJOU,%20MAINE.htm#Ingelgerdied888A

GUY d'Anjou (-[970]).

The Gesta Consulum Andegavorum records that "Fulco…filiosque…quorum unus Guido" was made Bishop of Soissons by "Hugonem Abba-Comitem"[55]. "Wido filius Fulconis Andegavensis, sancti Martini Turonensis canonicus" was installed as Bishop of Soissons in 937 in succession to "Abbo Suessorum"[56].

His father offered him as a hostage to the Normans in return for the release of Charles III "le Simple" King of the Franks in 922.

According to the French Wikipedia page of his father Foulque I d'Anjou:

http://fr.wikipedia.org/wiki/Foulque_Ier_d%27Anjou

Gui or Widdo was made Canon of St-Martin de Tours, and then Bishop of Soissons 937-973.