Grobwali

A Grobwali is a rare half-dwarf, half-goblin hybrid. As the two races are diametrically opposed arch enemies which attack each other on sight such parings are uncommon indeed. Grobwali are usually overly large (that is, large for either a dwarf or goblin.) Unlike Goblins they can move about without ill effect in daylight, and will usually have some form of facial hair. Grobwali will usually have some form of congenital birth defect, such as a hunch back, club foot, facial deformities, and so on.

Grobwali are usually seen as outcasts from both Dwarf and Goblin societies, and usually end up as bitter loners and hermits.

Hobgoblins

Hobgoblins originated in European folklore as household spirits (which probably evolved from a form of ancient ancestor worship,) and played a similar role to goblins, brownies, pixies, etc. They were generally not seen as "evil," but would play tricks if not given the proper respect.

In modern fantasy fiction, Hobgoblins are a larger, stronger, brutish form of goblin. They are usually a greenish color, have features of various animals (claws, pig noses, etc.) and are mostly beholden to some figure of greater evil.

Duende

In the folklore of various cultures in South America, a Duende is a Gnome-like house spirit, who lives within the walls and under the floors. They are known for pulling various pranks, as well as clipping the toenails of children (sometimes accidentally the entire toe.)

Throughout 2008 in Argentina there have been several sightings of a shadowy, side-stepping, creepy dwarf with a pointed hat, including several videos. Is the Duende real, or is it merely a prankster reaching for 15 minutes of internet fame? Who can really say.

Link to the "Gnome of Argentina" video

Gnomes

Gnomes spring from European (particularly German) mythology. They are similar to various types of other household spirits of the times such as browines, nixies, goblins, etc. The modern conception of a "Garden Gnome," evolved in the city of Colonge where they are called "Heinzelmännchen," nocturnal helper spirits that tended to the gardens after hours.

In fantasy fiction, Gnomes are generally seen as a friendlier offshoot of Dwarves, generally depicted as shorter, whimsical, jolly, with the characteristic long beard and pointed hat.

Ikels

Small, hairy dwarfish humanoids with glowing red eyes. Sightings of these creatures are often connected with UFO activity in South America. In contrast with the cold, calculating, emotionless stereotype associated with sightings of other alien types (such as the Grays,) these are rather aggressive and violent. In the 1950s several boys reported an abduction attempt by these strange creatures, in which they had to fight them off with stones. Sightings of such short hairy wildmen pre-date the UFO era, leading to the speculation that they are in fact not extraterrestrials but a hidden subterranean race.