His parentage is confirmed by the charter dated 26 May 1028 under which Francon Bishop of Paris agreed with "Albericum illius supradicti Gosfredi filium et heredum", concerning a prior grant by the bishop's predecessor to "Gosfrido comiti Landonensi castri", with the approval of "fratribus ipsius Alberici, filiis Hugonis Pertice…Gosfredo et Letoldo". A genealogy presented by Foulques IV "le Réchin" Comte d'Anjou to the bishop of Angers in [1085], justifying the annulment of his fourth marriage with the daughter of Gauthier Comte de Brienne, states that "ex Letaldo, Albericus natus est, ex Alberico, Beatrix, ex Beatrice, Gosfredus de Castello Landonensi, ex Gaufrido, Gaufridus et Fulco presens". His name is confirmed by a charter (undated?) under which [his son] Geoffroy III Comte d’Anjou donated fishing rights on the Mayenne river to Angers Saint-Serge, for the souls of “Geoffroy son père et de Geoffroy Martel son oncle”.
He succeeded his half-brother as Comte de Gâtinais, Seigneur de Château-Landon. The fact that Aubry Comte de Gâtinais and Geoffroy [II] Comte de Gâtinais were two different individuals, the inevitable conclusion from the two sources cited, is somewhat clouded by the Historia Comitum Andegavorum which records that "Gaufridus Martellus…nepotibus suis" were "filiis Adhelæ sororis suæ et Alberici comitis de Gastinais", by the Chronicle of Saint-Maxence which names "Alberici Contracti comitis de Gastina" as father of "Goffredus et Fulco Rechin", and by Orderic Vitalis who records that “Goisfredus Martellus Andegavensium comes” died childless and left “Goisfredo nepoti suo Alberici Wastinensium comitis filio” as his heir. 1
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