He get called by his friends Khaz-damur as a joke but the nickname is now part of him.

Damur Doomhammer was born in  the Iron Hills. From a young age, Damur exhibited a remarkable aptitude for weaponsmith. His parents, skilled smiths of the Iron Hills, taught him the secrets of forging sturdy weapons.

As Damur grew, he fostered strong friendships with a group of fellow young dwarves from the Iron Hills. These friends, like him, shared a deep love for crafting and a fierce dedication to their homeland. Together, they embarked on many journeys into the heart of the Iron Hills, extracting ores and crafting exceptional arms and armor that helped bolster the defenses of their people.

However, the peaceful days of the Iron Hills were soon disrupted by the ominous presence of a gathering orc horde.  Fear and unease spread among the dwarves as the orc menace grew.

One fateful day, while Damur and his friends were deep within the mines, they were ambushed by the ruthless orc horde. The dwarves fought valiantly, their hammers and axes swinging with unwavering determination, but the orcs' sheer numbers and ferocity proved overwhelming. Damur, amidst the chaos, watched in anguish as one by one, his loyal companions fell to the relentless orc blades.

With his friends' sacrifices etched into his memory, Damur fought his way out of the battle, narrowly escaping the clutches of the orcs. Though he survived, the heavy burden of grief and guilt weighed on his shoulders. He could not forgive himself for not being able to save his friends, and their loss haunted him every day.

Determined to avenge his fallen comrades and to safeguard the Freepeople from further threats, Damur Doomhammer set out on a quest. He journeyed across Middle-earth, searching for allies and a means to rid Middle-Earth of the filthy orcs and all the evil lurking by, so the freepeople can live in peace.