Kievanism

A polytheistic religion practiced in the south of the Kievan Empire.

Gods include:

Dazhbog, the sun god
Mokosh, the only female deity, associated with the Moist Mother Earth
Perun, god of thunder and lightning and of war
Simargl, the only non-human deity, he is a winged animal, possibly a Gryphon.
Stribog, god of wind and storm

    (Greek translation from the Arabic in a book found in Prince Vselov's library)
    The Hindoo sages themselves say that their religion has not spread far, as the True Faith has, and only
    very few are the times it has left the area of Hind, and those areas immediately around it that have not
    been converted. One time it spread to the East, even further than any Believer has traveled, to strange
    savage lands wherein dwell strange monsters, such as women whose heads detach from their bodies, and men
    who divide their bodies in half. Also, it spread to the West twice, once to the North and once to the
    South. Iskander is said to have brought certain statues and holy men back from Hind with him, and these
    were carried North, and inspired unbelief there; while certain Hindoos in the forms of snakes traveled to
    the south and there spread, as snakes do, their poison. Surely Allah will grind them beneath his heel!