H. P. Blavatsky

Dwellers. A term invented by Bulwer Lytton in Zanoni; but in Occultism the word “Dweller” is an occult term used by students for long ages past, and refers to certain maleficent astral Doubles of defunct persons.

Source: H. P. Blavatsky, The Theosophical Glossary, art. Dwellers