Gundabad Orc

Don't mind him, laddie. Thorin has more cause than most to hate orcs. After the dragon took the Lonely Mountain, King Thror tried to reclaim the ancient Dwarf kingdom of Moria. But our enemy had got there first. Moria had been taken by legions of Orcs led by the most vile of all their race: Azog the Defiler. The giant Gundabad Orc and
he had sworn to wipe out the line of Durin.
-Balin