About Gerberge ?
Gerberge, mother of Conan 'le Tort' (the Crooked).
Her parentage is not known.
Spouse: Judicaël, Comte de Rennes.
CONAN de Rennes, son of JUDICAËL [Juhael] Comte de Rennes & his wife Gerberge --- (-killed in battle Conquereil 27 Jun 992).
The Chronicle of Nantes names "Conano filio Judicael Berengarii Redonensi comite" when recording that he held a large part of Brittany from Thibaut [II] Comte de Blois and fought with Hoël Comte de Nantes. His parentage is confirmed by the Chronico Sancti Michaelis which records the death of his grandson "Gaufridus Dux Britanniæ filius Conani filii Juhelli Berengarii" in 1008. Comte de Rennes.
He succeeded in  as CONAN I "le Tort" Duke of Brittany. Rodulfus Glaber records that Conan "crowned himself with a royal diadem", was defeated by his brother-in-law Foulques Comte d'Anjou, and surrendered after his right hand had been cut off. The Chronico Sancti Michaelis records that "Conanus Brito…filius Juhelli Berengarii" was killed in battle "V Kal Jul 992" against Foulques Comte d'Anjou. The Chronicle of Nantes reports that he was killed at the battle of Conquereuil, dated "992 V Kal Jul" in the Chronicon britannicum. The Chronicon Kemperlegiense records the death "in bello Conçurruç…V Kal Jul" of "Conanus comes, filius Iudicaëlis Berengarii Comitis Redonensis".