I really want this conversation to happen:
Secondary character: Who are you?
Logan: I'm The Wolverine
SC: Really? You've named yourself after the Wolverine?
Logan: Yeah, you know wolves and stuff.. me in the wild with the wolves.. that sort of hardcore stuff
SC: Em.. a Wolverine isn't a type of wolf, it's a weasel.
Logan: Yeah.. wolves and stuff and... what? A weasel? I'm named after a weasel?
See, this is one reason it bugs me that they cast someone as tall as Hugh Jackman in the role. Wolverine is called that because he's small and scrappy like a wolverine. As far as I know, the movies have offered no alternative explanation for why someone who's 6'3" would adopt that name.