Cognac Prince de DIDONNE – XO PRODUCT - ORIGIN COGNAC, Appellation d'origine contrôlée, JONZAC, France. Regions: Petite Champagne, Fins Bois and Bons Bois AGING Double distillation of COGNAC eau de vie, traditional method of the Charente area using a swan-necked still. HISTORY 25 years minimum in oak casks from the Limousin and Tronçais forests.