Dumathoin (DOO-muh-THOE-in)

The dwarven god of mining and the underground.  He is known as, "The Keeper of the Secrets Under the Mountain".   He is highly protective of dwarven resources and traditions preferring an 'isolationist' approach to dwarven interactions with others.
Pantheon - Faerun https://forgottenrealms.fandom.com/wiki/Dumathoin