General:
* Dwarven Elves: This emphasizes their connection to caves and underground environments, while retaining their elven lineage.
* Cavern Elves: A simple and descriptive name, directly referencing their habitat.
* Shadow Elves: This implies a connection to darkness and the hidden depths of caves.
* Deep Elves: Similar to "Shadow Elves," this name emphasizes their subterranean dwelling.
* Rock Elves: This name highlights their association with the rock formations of their caves.
* Underdark Elves: This name is inspired by the "Underdark" setting in Dungeons & Dragons, suggesting a dark and dangerous underground environment.
More specific:
* Crystal Elves: This name implies a connection to crystal formations found in some caves.
* Emerald Elves: This suggests a connection to the green glow of some cave-dwelling creatures.
* Geode Elves: This name evokes the image of elves living in crystal-lined caverns.
* Cave-born: This name emphasizes their origin and ties them directly to the caves.
Ultimately, the best name will depend on the specific details of your story and the characteristics you want to emphasize.