Dwarves of Belegost
From Tolkien Gateway
The race of Dwarves whose halls were at Belegost, the northernmost of the two great Dwarf-cities that stood in the Blue Mountains during the First Age. They had generally better relations with the Elves than their neighbours in Nogrod, and as well as being responsible for the building of Menegroth, they fought bravely beside Elves and Men during the Nirnaeth Arnoediad.