User blog comment:RaijinRising/Ozpin and the Color Naming Rule/@comment-3257939-20151110032649

Following the idea that Ozpin was alive during The War, it adds a new variation to the theory of why he let Jaune into his school. Many say that it's because he knows of the Arc family and can see the potential in Jaune. But what if he literally met the Arc family at that time or to be more precise: Jaune's ancestor? The guy implied to be a warrior with a huge body count who named his weapon the Yellow Death even though what he was killing were other people rather than Grimm in the name of his kingdom.

Ozpin might have met the guy. Hell! There's a chance that they had some sort of relationship back then. Teacher-Student, Partners, maybe even rivals.