User blog comment:FairyRaven/Fairy Tail Chapter 325: Unity, Review and Commentary/@comment-49.176.34.54-20130330054337/@comment-7418318-20130330093911

According to those two arguments Yukino would have to be a Snow Dragon Slayer. Yuki means snow (with Yukino roughly being "of the snow") and she has white hair.

I think it's more likely that her parents gave her the name because of her haircolor.

Making a connection between her name, haircolor and a long dead dragon seems really forced to me. We don't even know if she can use any magic at all, much less Lost Magic.