The parentage of Giselbert is confirmed by a combination of documents: "Hirmingardis comitissa…Walonis filii eius, Gilleberti filii eius alterius" subscribed the testament of "Heriveus…Æduorum episcopus" dated 1 Nov 919 which names "genitricis nostræ domnæ Hirmingardis venerabilis comitissæ et fratrum nostrorum…domnus Walo pius Præsul et noster avunculus"; the Vita Sanctii Viventii Presbyteri names "Manasses…filius Gislebertus eiusdem Burgundiæ Dux"; "Warulfus…virum nobilem…filio equivoco eius Warulfo" petitioned "Ermengardis comitisse…seu filii eius Gisleberti comitis" for some donated property of Saint-Marcel-lès-Chalon by charter dated Jun 924. Flodoard records that in 924 "Raginardus" captured "castellum…Mons sancti Iohannis" supported by "nepotum suorum, Walonis et Gisleberti", but that "Rodulfi rex" recaptured the castle later in the same year. "Gisleberto comiti" is named in a charter of "Vuarulfo" dated 5 Jun 926.
Comte d´Autun: "Gislebertus…comes Heduensis" granted property to "suo fidele Guitbaldus…nec non eius coniuge Rutrudis" by charter dated 11 Dec 934, signed by "Gisleberti comitis, Ermengardi, Adaledis filiam eorum…". "Hugo...comes et marchio" donated property "in comitatu Belnensi...in uilla...Nolliacus et...in uilla Crisentiaco", for the souls of “genitoris nostri Richardi et Adheleidis”, in the presence of “Gilbertus comes, Albericus comes et filius eius Leotaldus et Adso noster fidelis”, by charter dated 1 Sep 936, subscribed by “...Roberti uicecomitis...”.
He became GISELBERT Duke of Burgundy, after his possible brothers-in-law Raoul and Hugues "le Noir" ceded him their rights to Burgundy in [936].
The Annales Nivernenses record the death "apud Parisius post pascha 956" of "Gislebertus comes". The Chronico Senonensi Sanctæ Columbæ records that "Gisleberto Principe Burgundionum" died "feria tertia post Pascha". The Chronicon of Odorannus records the death in 956 of “Gislebertus comes Burgundionem”, adding that “honorem eius cum filia...Leudegarde, ex qua postea a Radulpho Divionensi pipicus factus est” was received by “Otho frater Hugonis ducis”. After Giselbert died, Lothaire King of the West Franks asserted control over the duchy of Burgundy. 1
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