Commentary
Charles Cawley: Two possible parentages of Gauthier [I] have been suggested. Firstly, Edouard de Saint-Phalle suggests that he was Gauthier, son of Raoul [I] Comte [d'Ostrevant]. This possible parentage is also shown in Europäische Stammtafeln. The primary source which suggests that this might be the case has not been identified. The second possibility is that he was the same person as Gauthier Comte de Dreux: the editor of the compilation of Chartres charters suggests that "Walterius…comitis Waleranni filius" (Gauthier Comte de Dreux) inherited "comes Velcassinus" (Vexin) from his father, and "Ambianensis" (Amiens) from "matre autem Eldegarde" (acquiring Dreux from his wife's family). The primary sources on which this information is based have not been identified. However, two facts suggest that this second hypothesis may be correct. Firstly, Gauthier Comte de Dreux is also recorded with a wife named Eva (although the necrology entries quoted here suggest that there were two countesses of that name at the time). Secondly, the castle of Mantes, occupied by the descendants of Gauthier Comte d'Amiens, was near Dreux. One possible resolution of the problem is signposted by Seversmith who states that Gauthier [I] was the son of "Raoul de Gouy" whose wife he names "Eldearde". ... The wife of Waleran, supposed father of Gauthier [I] under the second possible case, is named "Eldegardis". If Seversmith is correct, it is possible that Eldegardis married firstly Raoul [I] Comte [d’Ostrevant] and secondly Gauthier Comte de Dreux, and that Gauthier [I] was the son of her first marriage. It should be noted that the charter dated to before 967 under which Eldegardis made a donation for the soul of her husband Waleran, with the consent of "Walterio comite filio meo", does not specify that Gauthier was Waleran’s son, although the omission of an earlier husband from the document would be surprising if that husband had been Gauthier’s father."

It is not clear which one of his wives is the mother of Gauthier II
Family
ClaimDetailEvidence
Child +Gauthier de Valois II, Count of Amiens (e943-) [S2724]
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Attributes
ClaimDetailEvidence
GenderMale
NameGauthier I, Comte d'Amiens [S2724]
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NameGauthier de Valois I, Count of Amiens
no source
TitleCount of Amiens [S2724]
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Marriage 1st [S2724]
Eva
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Marriage 2nd [S2724]
Adela. Cawley states: According to Europäische Stammtafeln, she was Adela d'Anjou, daughter of Foulques [I] "le Roux" Comte d'Anjou & his wife Roscilla [de Loches] (after 909-). The primary source on which this is based has not been identified; it is possible that it is speculative, based on one of her sons being named Foulques.
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Timeline
ClaimDateDetailAgeEvidence
Birthest 914 (907-922)
 
Living925 [S2724]
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Living987 [S2724]
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Sources
IndexTitle
[S2724] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Northern France: Amiens, Montreuil, Ponthieu)" (v4.4 Updated 24 November 2019) (https://fmg.ac/Projects/MedLands/nfraamp.htm).