Berengar II bĕr´ĭng-gər [key], d. 966, marquis of Ivrea . In 950 he made himself and his son joint kings of Italy, but his great unpopularity and his attempt to force Adelaide , his predecessor's widow, to marry his son, brought the intervention (951) of Otto I of Germany. Berengar swore fealty to Otto in 952. Later he ravaged Italy and intrigued with Pope John XII against Otto, who captured and imprisoned Berengar in 963.
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