 Complete the following phrase:  François de Bourbon was the third and youngest son of Gilbert de Bourbon, the Count of Montpensier, and his noble Italian wife Clara Gonzaga, with both of Françoiss parents dying before he even became a teenager. François fought loyally under the command of his elder brother Charles in Guyenne and Navarre and was rewarded and compensated for his services by Francis I of France through letters patent with the Duchy of Châtellerault named after the French city of Châtellerault, alternatively spelled Chatellraud, in Nouvelle-Aquitaine in February 1514. François de Bourbon was killed in action on 13 September 1515 at the 