The primary source which confirms his parentage has not yet been identified.
Comte de Vendôme. Comte de Corbeil, de iure uxoris. Vicomte de Paris. "Burchardus comes" consented to the donation by "fidelis meus…Arduinus" by charter dated 1 Sep 976, subscribed by "Burcardi comitis Vindocinensis, Rainaldi filii". "Gaufridus atque Burchardus comites" confirmed the donation by "collibertam nostram Ermengardam" at the request of "fidelis nostri Fulchardi vicecomitis" by charter dated 19 Jul 985, subscribed by "Gaufredi comitis, Fulconis filii eius".... "…Burchardi comitis…" subscribed the charter dated 997 under which Robert II King of France donated property to "congregationem SS Bartolomæi atque Maglorii" in Paris. "Buchardus comes et eius filius Parisiensis episcopus Rainaldus" confirmed a donation of revenue to Marmoutier by "vassallus…Dodo" by charter dated 998. "Robertus…Francorum Rex" confirmed donations to "monasterii Fossatensi" by "Parisiacensis ecclesiæ episcopus…Renoldus et pater eius…comes Burchardus" for the soul of "Elisabeth comitissæ" by charter dated 998. Guillaume of Jumièges records that “quidam eius miles...Walterius” captured his castle from “Burchardus Milidunensis castri comes”, who was living “apud regis Francorum curiam”, and handed it secretly to “Odoni comiti”, and that the castle was recaptured on his behalf by the king with the help of Richard II Duke of Normandy. It is probable that this passage relates to Bouchard Comte de Vendôme, in his capacity as comte de Corbeil, as later comtes de Corbeil were recorded as holders of Melun. "Burchardus…castri comes Curbolii…cum filio meo Rainaldo…Parisensium episcopo" authorised donations to the abbey of Saint-Maur-des-Fossés by charter dated 1 Mar 1006, subscribed by "Roberti vicecomitis, Nanterii et Joscelini eius filiorum…Joscelini Miliduni vicecomites".
The necrology of Le Mans Cathedral records the death "V Id Jan 1007" of "Burgandus comes". 2
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