User blog comment:JauneArc01/Jaune and Ozpin/@comment-17731212-20130909144233

I honestly think that Ozpin would have known Jaune's family in the least to accept him into the school. If Jaune's track record is being taken into account, Jaune must have been pretty good to enter the school. The notion of Ozpin being related to Jaune is a bit farfetched to me, but as an uncle not by blood makes more sense. (If you're gonna ask, that means that Ozpin was close enough to the Arc family to be considered Jaune's uncle)