smogmf

The smogmfs are a race of diminutive people which live in a hidden forest village of mushroom houses. They stand three apples high and use the word "smogmf" interchangeably with any verb or noun, making it hard to communicate with them. They have vague legends of being descended from similar little blue people who had two arms and two legs, and accredit their current appearance to some sort of magical experiment gone wrong.

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.

Fairy

A Fairy is a type of primordial nature spirit, usually connected to forests or woodlands. The term refers to many different types of supernatural entity (brownies, pixies, nixies, goblins, trolls, etc.) as well as with anything to do with the supernatural realm, i.e. "the Land of fey," or "Morgan Le Fay." In western European belief they originated either as fallen angels or as a distinct species all their own. Much of mythology has to deal with how one avoids fairy mischief, such as charms to keep them away, prevent them from stealing babies, etc.

See also:

Nixie
Goblin
Tomte
Troll

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.

Redcap

The Redcap is one of the more psychotic supernatural entities one may encounter. They are named thus becasue they die their hats with the blood of their victims. Should the cap ever dry out they will die, so they are compelled to kill often. Redcaps wear iron boots but are still extremely fast, and will usually impale their victims on iron spikes or tear them apart with their bare hands.