Who is gray beaver in the book White Fang?

Grey Beaver is White Fang's Indian owner or his first owner. He beats White Fang, but the next owner, Beauty Smith beats White Fang even more. Beauty Smith, a man that lives in Fort Yukonwanted, wanted to buy White Fang, but Gray Beaver refuses, so Beauty Smith gave Gray Beaver some whiskey, and when Gray Beaver started to get addicted to whiskeys, and started buying them from Beauty Smith. When Gray Beaver doesn't have enough money to get more, he had no other choice but to sell White Fang to Beauty Smith in order to get money for more whiskeys. So Beauty Smith became White Fang's next owner.