- Married (2): 2 Mar 979
- Died: After 18 Oct 984
"Gausfredus comes [et]…Adeleidis uxor mea" jointly donated land in "pago Cabilonensi" by charter dated Mar 979, her first marriage being deduced from "Hugo filius Lanberti comitis" acting jointly with them and signing "Hugonis filii eius" directly after "Adeleidis" in the subscriptions. "Gauzfredi comitis, Adaleidis comitissa" subscribed a charter dated 18 Oct 984.
The origin of Adelais has been the subject of much speculation. Settipani has suggested that she was the daughter of Hugues Comte en Bourgogne & his wife Willa von Thurgau. Chaume suggested that she was the daughter or granddaughter of Charles Constantin Comte de Vienne. Bouchard sets out several different theories concerning Adelais's origin, with the aim mainly of explaining Lambert's succession to the county of Chalon by inheritance through his wife. However, none appears to be based on any primary source and the author concludes that she prefers "to leave Adelaide's origins unknown". An earlier theory was that Adelais was the sister of "Wera" Ctss de Meaux, which would mean that she was Adelais, daughter of Giselbert Duke of Burgundy, Comte de Chalon-sur-Saône et de Troyes & his wife Ermengarde [of Burgundy]. Duchesne suggested that Adelais Ctss de Chalon was the daughter of Robert Comte de Meaux et de Troyes, although this would mean that the two wives of Geoffroy I Comte d'Anjou were sisters, no mention of which has so far been found in contemporary sources. Yet another suggestion is that Adelais Ctss de Chalon was the same person as Wera-Adelais Ctss de Meaux. However, this is even more unlikely chronologically considering the estimated birth date of Wera-Adelais and the fact that Adelais de Chalon gave birth to at least one child by her second husband, Geoffroy Comte d'Anjou, after their marriage in 979. It would also mean that Comte Geoffroy married, as his second wife, his first wife's mother which is unlikely to have been accepted by the church. Finally, in 1619, Duchesne suggested that Adelais was the sister of Guillaume I Comte d'Arles.
Adelais married Lambert DE CHALON Count of Chalon, son of Robert DE CHALON Viscount of Autun & Dijon and Ingeltrude. (Lambert DE CHALON Count of Chalon died on 22 Feb 979.)
Adelais also married Geoffroy I "Grisegonelle" D' ANJOU Count of Anjou, son of Foulques II "Le Bon" D' ANJOU Count of Anjou and Gerberga DU GÂTINAIS, on 2 Mar 979. (Geoffroy I "Grisegonelle" D' ANJOU Count of Anjou was born between 938 and 940 in Anjou, France, died on 21 Jul 987 in Battle At Marcon and was buried in église de Saint-Martin, Châteauneuf.)