His parentage is confirmed by a charter dated 1117 which records a dispute between the monks of Saint-Arnoul de Crespy and [his son] "miles Ingelrannus" who claimed "quoddam burgum in suburbio castri situm" [château de Crespy] possessed "tam a avo suo quam a suo patre Drogone", and granted to his mother as dower, while the monks claimed that "Walterus…comes Ambianensis simul et Crespeiensis cum uxore sua Adela" [Gauthier [II] "le Blanc" Comte d’Amiens...] had donated the land, as confirmed by Robert II King of France and others, and that "Hugo avus eius" who had invaded the place with violence had later relinquished it, retaining "mansuram suam" in return for an annual payment.
Seigneur de Boves. "Drogonis de Bova, Nevelonis de Bova" subscribed the charter dated 1042 under which "Theobaldus et Stefanus frater meus germanus" [Thibaut III Comte de Blois and Etienne Comte de Troyes] donated "alodium nostrum…in pago Ambianensi super fluvium Iseræ…Crissiacum…[et] Gaudiaco et Rivaria" {Croissy, Gouy en Amiénois}, for the soul of "patris nostri Odonis comitis". "Drogo Bovensis, Robertus filius eius, Oilardus miles ipsius" subscribed the charter dated 1069 under which "Rodulphus…Ambianensis comes" regulated rights of the vicomtes in the lands of the monks of Saint-Firmin and donated property to the church of Amiens. Guy Bishop of Amiens names "Drogonis Bovensis…uxor illius ac filii Ingelrannus…et Robertus, Ansellusque", in the presence of "Eustachius vicedominus, Guermundus frater eius", in an undated charter relating to "advocatione et vicecomitatu Costency".
The name of Dreux's wife is not known. She outlived her husband according to the charter dated 1117 which is cited above. 2
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