In what year did the Carolingian dynasty come to power?

They began to rule in 751, when they overthrew Childeric III, and he was the last of the Merovingians. The Carolingians sat on the throne for 236 years, until 987. The name of the dynasty comes from the name Karl. With the Carolingians, power passed to the heirs, which in no way distinguished them from the Merovingians. The dynasty ceased to exist in full in 1122 after the death of Adelaide. The male line ended a little earlier when Herbert IV died.