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Drogo was a minor throughout his reign, and so he was under a Regency. Drogo's Regents were his uncle the Count of Blois, Theobald I (who entrusted the administration of the Duchy to Wicohen, Archbishop of Dol, and the Count of Rennes, Juhel Berengar) and his stepfather the Count of Anjou, Fulk II, who married the Wrybeard's widow, Adelaide of Blois.
- Hagger, Mark S. (2017). Norman Rule in Normandy, 911-1144. The Boydell Press.