Hobgoblin in the context of "A Midsummer Night's Dream"

A brownie or broonie (Scots), also known as a brùnaidh or gruagach (Scottish Gaelic), is a household spirit or hobgoblin from Scottish folklore that is said to come out at night while the owners of the house are asleep and perform various chores and farming tasks. The human owners of the house must leave a bowl of milk or cream or some other offering for the brownie, usually by the hearth. Brownies are described as easily offended and will leave their homes forever if they feel they have been insulted or in any way taken advantage of. Brownies are characteristically mischievous and are often said to punish or pull pranks on lazy servants. If angered, they are sometimes said to turn malicious, like boggarts.

Brownies originated as domestic tutelary spirits, very similar to the Lares of ancient Roman tradition. Descriptions of brownies vary regionally, but they are usually described as ugly, brown-skinned, and covered in hair. In the oldest stories, they are usually human-sized or larger. In more recent times, they have come to be seen as small and wizened. They are often capable of turning invisible, and they sometimes appear in the shapes of animals. They are always either naked or dressed in rags. If a person attempts to present a brownie with clothing or baptize it, it will leave forever.

A boggart is a supernatural being from English folklore. The dialectologist Elizabeth Wright described the boggart as 'a generic name for an apparition'; folklorist Simon Young defines it as 'any ambivalent or evil solitary supernatural spirit'. Halifax folklorist Kai Roberts states that boggart ‘might have been used to refer to anything from a hilltop hobgoblin to a household faerie, from a headless apparition to a proto-typical poltergeist’. As these wide definitions suggest boggarts are to be found both in and out of doors, as a household spirit, or a malevolent spirit defined by local geography, a genius loci inhabiting topographical features. The 1867 book Lancashire Folklore by Harland and Wilkinson makes a distinction between "House boggarts" and other types. Typical descriptions show boggarts to be malevolent. It is said that the boggart crawls into people's beds at night and puts a clammy hand on their faces. Sometimes he strips the bedsheets off them. The household boggart may follow a family wherever they flee. One Lancashire source reports the belief that a boggart should never be named: if the boggart was given a name, it could neither be reasoned with nor persuaded, but would become uncontrollable and destructive (see True name).