Demonology ideas that date from the oldest and most stable folklore and mythological traditions are emphasized in multiple ethnic cultures. An early form of religion directly coupled with mythology is represented by the black faith of the Mongolian and, more broadly, Central Asians, which evolved from many different beliefs bequeathed by ancestors (belief in the forces of space and nature, in the souls of dead ancestors, totemic ancestors, etc.). It made people perceive the world around as a set of elements dynamically influencing their lives where each element has its own origin, its own spirit somewhat independent, which they worship and appease by means of sacrifice, incantation and primordial magic. Mythologization as a certain tendency of consciousness was preserved throughout all historical stages shaping the ethnic Mongolian society, including the Kalmyks. The paper discusses the naming of mythological characters (demonologems or demonims), defines the groups of nominations for „lower mythology‟ characters with a surreal denotation that does not exist in real life. The study aims to feature the ethnolinguistic functioning of demonology glossary in the Kalmyk language and to identify its significance in modern linguistic consciousness. The glossary is basically denoted through ethnocultural stereotypical ideas about demonology born in the minds of native speakers. The most productive are the nominative groups of mythical creatures determined by their habitat, by deleterious effects that malevolent entities can have, etc. Evaluative nominations are based on demonologemes that have a negative connotation fixed in the language.