"hello little baby yor a princess just like me and your thinking maybe its a pretty cool thing to be, but soon you'll see that everyone expects alot from you, and there are things a princess should and shouldn't do...but we..know better."-frozen deleted song We Know Better
they could very well be Hans' brothers! there's 12 of them! well, as long as you don't count Shang! and if you play the theory that all the princes are related...and forget that Eugene isn't a prince!