According the the lore Billy was an high furbolg war king under the mountain who declared war on the island of Kazan and discovered Pandaria. He died in the defeated the lich king and died in warcraft II.
darn, when you try to think while writing you start writing rubbish.
Jezpalimu
Billy noooooooooooooooooooooo D:
...Also, who's willing to bet "Billy" is some kinda Orc/Forsaken hybrid experiment thing?