Prince William, Duke of Cambridge – $40 million
One of the throne’s successors was Prince William, Duke of Cambridge. However, he did not want to wait until he was seated on the throne to amass a large sum of money. His riches came from a variety of sources, including inheritance and a monthly stipend. With his combined compensation from his job for British taxpayers, he amassed a sizable sum of money, allowing him to become a wealthy future King.
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