Yukon Jack - heads up!

Yukon Jack - I was looking up information on whiskey, particularly Yukon Jack when I found this Yukon Jack. Apparently a comic book hero from marvel comics.
He is a very skilled hand to hand fighter, usually fighting with a very strong and durable bone knife. He is apparently immune to temperature changes despite wearing little more than a loincloth. Hmm.. I think I prefer the Whiskey!