Brownie brings the association of chores done for a saucer of milk. These guys don't DO chores.
Gnome is taken, as seen above.
Hob has possibilities, although traditionally they were household helpers too.
Pixie makes people think of sparkly flittery things with bug wings and giggles. These are Not that kind of fairy.
Same with Sprite, although these days more children and adults think of that as a syrupy soda drink from a vending machine, not a mythic creature.
