Forgotten Disney Princesses

What does it take to be a Disney princess? I'm sure we all know the official ones, but what about other Disney characters? There are others that seem like they should be part of the line-up, but why aren't they? Here's my personal list of what I call forgotten Disney princesses. I read about some in my list from this website: https://vocal.geeks/15-characters-who-arent-on-the-official-disney-princess-list-but-should-be. I got my info about Elena of Avalor from this website: https://oh my.disney.com/insider/2015/1/29/meet-the-new-disney-princess-elena-of-avalor/. Update on 1/24/20: Oh my word! I just saw that Eilonwy is actually NOT from The Sword and the Stone, but from The Black Cauldron, which I also haven't ever seen! So sorry! My mistake! It's basically about a pig farmer who has to fight off an evil king and who I assume saves Eilonwy from him. Again so sorry for the misinformation!