https://en.wikipedia.org/wiki/Berengar_II_of_Italy

Berengar II was the King of Italy from 950 until his deposition in 961. He was a scion of the Anscarid and Unruoching dynasties, and was named after his maternal grandfather, Berengar I. He succeeded his father as Margrave of Ivrea around 923 , and after 940 led the aristocratic opposition to Kings Hugh and Lothair II. In 950 he succeeded the latter and had his son, Adalbert crowned as his co-ruler. In 952 he recognised the suzerainty of Otto I of Germany, but he later joined a revolt against him. In 960 he invaded the Papal States, and the next year his kingdom was conquered by Otto. Berengar remained at large until his surrender in 964. He died imprisoned in Germany two years later.