there is two main thing about russian paganism  firstly, it is not as developed as the mediterranean or germanic and there are very few sources and literary adaptations by contemporaries. secondly, russian paganism has merged very strongly with christianity, a huge number of practices of the russian christian tradition have pagan roots. russians practiced dual faith for a very long time, peasants had pagan names in parallel with christian ones until the time of peter the great.
Russian Federation