Taking into consideration the meaning, pronunciation and origine of Vile, it still get a hard 'no' from me. This is solely bc of the English meaning. I think you could only get away with it as a nn for
Vilhelm maybe, bc then he could be
Vilhelm in English speaking settings. Maybe changing the spelling to
Ville would have worked if that didn't bother me bc of the French meaning. I never heard of Vile in the way you're seeing the name. I doubt many people would, so that would just leave the English word. If I encountered it I'd assume he was Nordic, mainly bc
Vilhelm is and I would think it was related to
Vilhelm in some way.
I'm not a fan of Emilius. To me it sounds like an
Roman Emperor name. With a surname starting with an N it would definitely be a better choice than
Emilian. I don't really like
Emil either, otherwise I'd suggest that.
Emilio might be tricky to pull off if you're Swedish, but would eliminate your problems with
Emilian as well.