A kind of domestic spirit in German mythology, corresponding to the Scottish brownie and the English Robin Goodfellow.

an often mischievous household elf in German folklore

Kobolds are spirits of German folklore. The name comes from the German word kobalt or kobold meaning "evil spirit", and is often translated in English as goblin.

a small, vicious underground creature that walks erect and carries a sword.

Kobolds are a fictional species featured In the Dungeons & Dragons roleplaying game. Aggressive, xenophobic, yet industrious small humanoid creatures, kobolds are noted for their skill at building traps and preparing ambushes. In the original Dungeons & Dragons game, Kobolds were considered goblinoids but they have been depicted as reptilian humanoids since the release of the first edition Advanced Dungeons & Dragons game.