Drogo, Duke of Brittany
Drogo was the count of Vannes and Nantes and duke of Brittany from 952, when he succeeded his father, Alan Wrybeard, until his death in 958.
Drogo was a minor throughout his reign, and so he was under a Regency. Wikipedia
Born: 950 AD
Died: 958 AD (age 8 years), Angers, France
Parents: Alan II, Duke of Brittany and Adelaide of Blois