Lord of the Glittering Caves

From Tolkien Gateway

Lord of the Glittering Caves was a title created by the dwarf Gimli son of Glóin for the overlordship of Aglarond. It is not known who succeeded him, if anyone.

After the downfall of Sauron, Gimli led a party of the Dwarves of Erebor to Aglarond, the Glittering Caves of the White Mountains within the realm of Rohan, of which there was an entrance in Helm's Deep. There they founded a colony, and Gimli became known as the Lord of the Glittering Caves. His Dwarves performed great services for the Rohirrim and the Men of Gondor, of which the most famous was the making of new gates for Minas Tirith, forged out of mithril and steel.[1]