Logically speaking, Perun's attributes in people's imagination were gradually formed on the basis of his functions as a Thunderer. This process must date back to the time of the existence of the Indo-European community, and it continued after its dissolution. Such Perun's attributes as his mighty force and bellicosity obviously go back to the earliest stage in his evolution, and from these attributes come his connection with the oak, the hammer-axe, and the arrows, as well as in his impact on yield and fertility, and his general connection to women. However, establishing Thursday as Perun's day must have occurred already under the influence of Christian calendar.
That was the image elaborated in myths that got into the Vainakh folklore. Let us now consider the data presented by the Vainakh folklore and their correspondence to the East Slavic ethnography and folklore.
\ In Vainakh folklore there are stories about women sent by Perun to the neaven for pouring water and making rain. These stories express most likely th,e Slavic notions of witches and sorceresses — the rain-makers, or the «Blitzhexes» ('witches of lightning') as they were called by the Germans. It was believed in the 19th century Ukraine that the witches could steal the rain from heaven and hold it in buckets. In Afanasyev's collection of tales one can see witches flying in the heaven and rolling the barrels there (completely like in the Chechen stories of Pir"on's women), while the clang of these barrels created thunderstorms. In Russia, a related custom of breaking the barrels was used in order to call forth a rain.
What was originally contained in the barrels having been broken? In Russian fairy-tales it was the unusual or specially blessed children that are imprisoned-in a barrel. Such children (often the twins) were thought of as conceived by other-world spirits. The barrel with the children was left adrift in the sea. Upon landing, the wonderful children would break out of the barrel and be released to the freedom where the great future awaited them. This motif was frequently used as a legal device by usurpers on a throne in order to create a tie to a traditional royal dynasty (Sargon, Perseus). A similar idea was present in the custom of the trial by drowning (if she was really a witch, she wouldn't drown). The presence of «god's children» probably eventually led to the substitution of drowning by exile. Indeed, according to the old Russian custom, the worned out sacral objects were floated in the river. The women marked by god were believed to have drowned or have been driven out by waterways. They were those who become mermaids (in Russian «rusalki»).