Okay I'm trying to make a complete list of all Disney Princesses. To make this list the Disney girl must be either born royalty or she marries royalty. (So while Mulan is awesome, she doesn't make the cut) This is to include all princesses not just leading ladies.
If you see one is not on the list please comment.

Born Royalty
-Adella (King Triton's Daughter)
-Alana (King Triton's Daughter)
-Andrina (King Triton's Daughter)
-Aquata (King Triton's Daughter)
-Ariel
-Arista (King Triton's Daughter)
-Atta (A Bug's Life)
-Attina (King Triton's Daughter)
-Aurora
-Dot (A Bug's Life)
-Eilonwy (The Black Cauldron)
-Frederica Janie de la Fontain (Cinderella. She is announced at the ball)*
-Jasmine
-Kiara (Daughter of Simba)
-Kida
-Mei (Daughter of the Emperor from Mulan)
-Melody (Daughter of Ariel and Eric)
-Mérida
-Minnie Mouse (The Three Musketeers)
-Pocahontas
-Rapunzel
-Snow White
-Su (Daughter of the Emperor from Mulan)
-Tiger Lily
-Ting-Ting, (Daughter of the Emperor from Mulan)


Married Royalty
-Belle
-Cinderella
-Jane Porter (Marries Tarzan, King of the Jungle)
-Nala (Wife of Simba)
-Tiana
-Faline (marries Bambi, who becomes Prince of the Forest)




*She's actually the only person referred to as a princess in the entire film making her one of the obscure Disney Princess.