Earth spirits

A gnome () is a mythological creature and diminutive spirit in Renaissance magic and alchemy, introduced by Paracelsus in the 16th century and widely adopted by authors, including those of modern fantasy literature. They are typically depicted as small humanoids who live underground. Gnome characteristics are reinterpreted to suit various storytellers and artists.

small, subterranean creature archetype associated with mining folklore

fairy-like beings of Arnhem Land in the folklore of the Indigenous Australians of northern Australia

spirits in Dutch mythology

Guhyaka(s) (गुह्यक, literally "hidden ones") is a class of supernatural beings in Hindu mythology. Like Yakshas (nature-spirits), they are often described as attendants of Kubera, the keeper of wealth, and protect his hidden treasures. Guhyakas are believed to live in mountain caves; thus their name, "hidden ones". As lord of Guhyakas, Kubera is called "Guhyakadhipati".