Sirtjas (sirtyas), Zettes, Chaklis, Zwergs, Screlingers (skrelinger, screling, skrelings), Bitsents, Iebans, Manehuns, gnomes, black alves - wise dwarfs, usually with a large head, according to Nenets, Norwegian, Sami, Lappish, Iceland, Germano-Scandinavian, Caucasian, African (dogons), Polynesian and other mythologies, living underground and standing guards over treasures hidden there.
They were afraid of light which was ruinous for them. As a rule, they mined a copper and iron ore, were skilful metallurgists, blacksmiths and jewellers, had magic knowledge and learned secrets of wizardry. According to the "Younger Edda" and other information sources, they had manufactured the treasures of gods-asses (aesirs) - the necklace of Brisingamen for goddess Freya, a gold hair for goddess Siv, the magic ship of Skidbladnir and the wild boar with the gold bristle of Gullinbursti for Freyr, the spear of Gungnir and the gold ring of Draupnir for Odin, the hammer of Mellnir for Thor (Donar), the treasure of Nibelungs, etc.
Read the article by Alexey Komogortsev "Return of the dwarf people" about three settlements of such beings and occurrings with the dwarf people presently.
The section "Aboriginal inhabitants"
Read also the works by A.Komogortsev "Mysterious Chudes. Who were Chudes metallurgists?" and "Mysterious Chudes and Slavic cult of a pangolin-corcodel"
Read my works "Underground-terrestrial megalithic complex of Israel", "Who constructed the underground-terrestrial megalithic complex of Israel and when was it constructed?", "Underground and rock cities of Cappadocia (Turkey)" and "Who also when had constructed the underground and rocky cities of Cappadocia (Turkey)?" (translated into English)