'Successor' in the Bible

“But you his successor, Belshazzar, have not humbled your heart, even though you knew all this.

It seemed good to Darius [who became king after Belshazzar] to appoint over the kingdom 120 satraps who would be in charge throughout the kingdom,

His successor will send out a tax collector for royal splendor, but in a short period of time he'll be shattered, though neither in anger nor in battle.'"