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José, Prince of Brazil, Duke of Braganza, died before he could ascend to the throne of Portugal.

A prince is a male member of a royal family. A female member is called a princess.

Each royal family has its own rules saying who is called a prince. In most of these families, the son of a king or a queen is a prince. In some families, the son of a prince is also a prince. In Monaco and Lichtenstein, the ruler of the country is called the prince.