Page "Regnal name" Paragraph 5

Ancient rulers in many parts of the world took regnal names or throne names which were different from their personal name.

This is known to be true, for instance, of several kings of Assyria, and appears to be the case for several Kings of Judah.

In Ancient Egypt, Pharaohs took a number of names-the praenomen, was the most commonly used, on occasion in conjunction with their personal name.