Eustachie DE TONNERRE, Comtesse de Bar-sur-Seine 1
- Born: Bar-sur-Seine, Aube, Champagne, France
- Married:
- Died: Between 1072 and 1090
 Research Notes:
Ctss de Bar-sur-Seine. "Rainardus…Lingonensis episcopus, Walteri Breonensis comitis heredis mei et uxoris sue sororis mee" donated property to Montiérender by charter dated 1072, subscribed by "Eustatie comitisse, Walteri comitis Brinensis, Engelberti filii eius, Widonis comitis, Girardi militis, Widonis militis, Aldonis". 2
Marriage Information:
Eustachie married Cte Gauthier I DE BRIENNE, son of Cte Engelbert III DE BRIENNE and Pétronille DE JOIGNY. (Gauthier I DE BRIENNE was born in Brienne-le-Château, Aube, Champagne, France and died before 1090.)
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