The only thing I don't like about it is that it sounds like wolvin', as in wolving/wolfing in an accent. And the first thing I think of there is when people went out mindlessly slaughtering wolves (although maybe people are more likely to think of 'wolfing something down').
Aside from that, I think it's cool. Wulvin or Wulfin could fix those connotations for me and remind me more of names like
Wulfric, but I do think 'wol' looks better than 'wul'.
I also prefer Wolvin when I pronounce it with more of an 'o' instead of the 'uh' in wolf.
I don't think there's anthing wrong with it sounding like wolverine.