Azog (the second known orc with this name) was a son of Bolg I. Like his brother,Bolg II, he was a Captain of Dol Guldur. He was a relatively unknown orcish Chieftain and didn't achieve any greater deeds but was the father of Mazog, who briefly ruled in Moria during the War of the Ring. He commanded a army of Moria Goblins against Mirkwood but was easily slain by Thranduil.