Prince

noun

1. A (male) ruler, a sovereign; a king, monarch.
2. A female monarch.
3. Someone who is preeminent in their field; a great person.

   "He is a prince among men."

4. The (male) ruler or head of a principality.
5. A male member of a royal family other than the ruler; especially (in the United Kingdom) the son or grandson of the monarch.