Prince is the surname of a pure-blood wizarding family. It is unknown if this family is still extant or still pure-blood, as the only known family member, Eileen Prince, married a Muggle and had a half-blood son. If she had been the only child then they would no longer be deemed pure bloods. However if Eileen had other siblings then the rest of her family could still be pure-bloods.  Upon the death of her son, Severus Snape, the female line of the Prince family likely became extinct, as Severus never had any children.
- Eileen Prince
- Severus Snape, also known as "The Half-Blood Prince", is a member of the Prince family, as his mother was a Prince.
Prince is a general term for a monarch or a member of a monarch's family, and is a hereditary title of some European royalty, likely alluding to the aristocratic status of pure-blood families in the wizarding world. The word is derived from the Latin princeps, meaning "first", which was one of the titles of the Roman Emperor, in which case it was generally translated as "First Citizen". The Prince is also the title of a famous political treatise by Niccolò Machiavelli; an interesting point considering that the adjective derived from the author's surname, Machiavellian, is defined as "attempting to achieve goals by cunning, scheming and unscrupulous methods", which may allude to the ideal traits of Slytherin house.