Known Princes and Princesses are:
- Prince Ansom of Jetstone - Former Heir; Croaked & Decrypted, now claims no royal title
- Prince Tramennis of Jetstone - Former Heir Designate (was not popped as an Heir); now King of Jetstone
- Prince Ossomer of Jetstone - Possibly Former Heir, unknown; Croaked & Decrypted, then Turned, then finally Dusted
- Jillian Zamussels of Faq - Former Popped Heir; now Queen of Faq
- Don King's son and daughter, of Transylvito - Former Popped Heirs; Croaked
"Prince" and "Princess" could be honorifics for all Royal units popped to a side ruled by a King or Queen.
A random percentage of Royal units popped on a Royal side might have the "quality" (like being Heavy) of being a Prince. (Since units popped by Royal sides have a random chance of being Noble or Royal, this might be another "step" up that ladder.)