Childeric III

Childeric III (c. 718/728 – c. 755) was King of the Franks from 743 until he was deposed in 751 by Pepin the Short. He was the last Frankish king from the Merovingian dynasty. Once Childeric was deposed, Pepin became king, initiating the Carolingian dynasty.

Source: Wikipedia — https://en.wikipedia.org/wiki/Childeric_III