Is he sometimes called Florian? I always thought his name was The Prince, because he was the first prince of the Disney Princes... To le google!
Huh... well what do you know. his name is Florian when used in Disney merchandise/for the franchise. And that he was bumped down from his original role because he was so hard to animate... interesting.
He also has these names: Prince Charming Prince Florian (occasionally used by Disney; for Disney on Ice) Prince Frederick (rumored)