Prince

A prince was a royal title referring to the son of a monarch.

The Devil was known as "the Prince of Evil" or "the Prince of Darkness." (TV: The Dæmons) One of the Beast's titles was "the Deathless Prince" or "the Prince." (TV: The Impossible Planet / The Satan Pit) The Sixth Doctor once referred to as "the Prince of Darkness." (TV: The Mark of the Rani)

Princes

 * Albert (TV: Tooth and Claw)
 * Bonnie Prince Charlie (TV: The Highlanders)
 * Charlie Smith (TV: For Tonight We Might Die et al.)
 * Draconian prince (TV: Frontier in Space)
 * Felix Yusupov (PROSE: The Wages of Sin)
 * Genei (PROSE: Useless Things)
 * Hector, Paris and Troilus (TV: The Myth Makers)
 * Kylo Sorsha (AUDIO: The Burning Prince)
 * Omar (AUDIO: The Destroyer of Delights)
 * Reynart (TV: The Androids of Tara)
 * Rupert (COMIC: Dog of War!, PROSE: The Roundheads)
 * Tandonian prince (TV: The Waters of Mars)
 * Zanith (AUDIO: Time Works)
 * Zixlyr (AUDIO: The Bride of Peladon)