*Perkʷūnos is the reconstructed name of the weather god in Proto-Indo-European mythology. The deity was connected with fructifying rains, and his name was probably invoked in times of drought. In a widespread Indo-European myth, the thunder-deity fights a multi-headed water-serpent during an epic battle in order to release torrents of water that had previously been pent up. The name of his weapon, *mel-d-(n)-, which denoted both "lightning" and "hammer", can be reconstructed from the attested traditions.
The Hand of Perkūnas by Mikalojus Konstantinas Čiurlionis (1909). Note that Perkwunos should be represented with a thunderstone, as the depiction of the hand holding the thunderbolt is of Near Eastern origin.
Proto-Indo-European mythology
Proto-Indo-European mythology is the body of myths and deities associated with the Proto-Indo-Europeans, speakers of the hypothesized Proto-Indo-European language. Although the mythological motifs are not directly attested – since Proto-Indo-European speakers lived in preliterate societies – scholars of comparative mythology have reconstructed details from inherited similarities found among Indo-European languages, based on the assumption that parts of the Proto-Indo-Europeans' original belief systems survived in the daughter traditions.
Trundholm sun chariot, Nordic Bronze Age, c. 1600 BC
Portrait of Friedrich Max Müller, a prominent early scholar on the reconstruction of Proto-Indo-European religion and a proponent of the Meteorological School.
Scheme of Indo-European language dispersals from c. 4000 to 1000 BCE according to the widely held Kurgan hypothesis. Center: Steppe cultures 1 (black): Anatolian languages (archaic PIE) 2 (black): Afanasievo culture (early PIE) 3 (black) Yamnaya culture expansion (Pontic-Caspian steppe, Danube Valley) (late PIE) 4A (black): Western Corded Ware 4B-C (blue & dark blue): Bell Beaker; adopted by Indo-European speakers 5A-B (red): Eastern Corded ware 5C (red): Sintashta (proto-Indo-Iranian)
Yama, an Indic reflex of *Yemo, sitting on a water buffalo.
