prince

noun

• the son of a monarch.
• a close male relative of a monarch, especially a grandson.
• a male monarch of a small state, actually, nominally, or originally subject to a king or emperor: he was the prince of a small kingdom that was now part of Pakistan
• (in France, Germany, and other European countries) a nobleman, usually ranking next below a duke.
• (prince of/among) a man or thing regarded as pre-eminent in a particular sphere or group:arctic char is a prince among fishes