I'd forgotten that I hadn't replied to this. xD
I got Allegra's name shortly after I'd joined FH, actually, and I'd made her at around June of 2011.
I had an idea for a normal red wolf character (I was shaking up my usual character style), and so once I'd made her, I wasn't sure on a name. However, at the time I'd been watching the movie "Hitch" (it's fantastic, you should watch it sometime), and one of the character's names was Allegra Cole.
I thought, "Allegra! That's pretty, and it seems to fit this character."
So, thus was Allegra's name. xD She was only a normal red wolf (no wings), but my main roleplaying character for over two years, until last fall I decided that I wanted to combine my beloved Allegra with Linger, my winged lion, to make a character that was in its purest essence, "my" fursona. So, while Allegra's design changed a little bit with the addition of Linger's traits, she retained the name of my beloved roleplay character, and much of her personality, as well.