Autumn Briana nn
Aubrey - sure, I think you could do it ... IF you always called her
Aubrey, introduced her as
Aubrey, and put that on all her paperwork etc ... I don't think it would work well in practical terms, but in terms of the names it's ok. The full name would get mostly "lost" and be a mere formality. So you'd have to like
Aubrey more than either
Autumn or
Briana, I think.
Aron nn
Ari - works as long as the first syllable is the same sound (AIR-on/AIR-ee, AHR-on/AHR-ee)
Aaron nn
Ari - works. Aari is fine too, doesn't matter IMO.
Schuyler nn
Sky - yep, that works. Schuy is weird. I've seen
Schuyler nn
Sky but never Schuy.