Bolg the Strong

Bolg was the strongest son of Azog and succeeded his father as Orc-lord of the North in T.A. 2799. A huge and powerful Uruk he was as dangerous as his sire. Bolg ruled his Orc-kingdom from his capital at Mount Gundabad and later commanded the army of Orcs and Wargs at the Battle of the Five Armies (T.A. 2941). He was slain in the battle by the awesome Northman hero, Beorn.

Important Date
died TA, 2941.

Fanfiction
One fanfiction story shows Azog abducting the elven-girl Hinarel, who supposably became the mother of his son Bolg.

Movie Trilogy
In the Hobbit Movies Bolg is depicted as a Pale Orc, an ancient line or breed of Orcs possibly of  demonic origin.