Dazhdbog in Russian mythology. In the ancient Russian mythology Dazhdbog appears as a son of the Almighty Perun and a mermaid named Ros. Perun is a son of Svarog (Vedic Isvara) who is a top God in Russian pagan beliefs, a kind of an analogue of Cronos of the Greeks, although he did not actually create the World, he only created the living Universe but... this is the different story of cosmological beliefs of Russians. Perun symbolizes a victory (not the war as he is not Mars, and ancient Russians did not have this kind of god) over enemies, lightnings and things of that sort (looks like Zeus of Greeks but not exactly as he shares some other functions). Basically, Perun is a male God, God of warriers, those who protect the Land. His day is July. 20th.So, you see that Dazhdbog is a grandson of Svarog, and we all, Russians, are his grandchildren. This kind of relationship makes Dazhdbog similar to Vedic Indra if you will, although I can not give a 100% for such a correspondence. I should also make a note that mermaids in Russian mythology are not the ones with a fish tail, as in many other European pagan religions, though. These are just beautiful girls that dance on celebrations, before harvesting, etc. Ros is also a name of the river which is still alive and doing well. It is in Ukraine, and it is one of the many branches of the river Dnepr. Look for the town called Belaya Tserkov (White Church) on the map and you will immediately see the river. One brunch of Slavs that lived near Ros called themselves rosichi or later rusichi that finally gave a name to the state of Rus, its Peter the Great's modification Rossiya (Russia) and to all Russkie (Russians). This explanation seems to be close to the truth because it has a very strong religious and mythological underlay -- a thing of the extreme, if not the first, importance when one is trying to analyze an ancient civilization. This explanation also seem to be connected with another name, Ruskolan, an ancient name for the state. It is a conjunction of two words: Rus and Kol. In this context Kol does not mean a stick (there is such a meaning of this word in Russian language) but a solar turn-around, equinox. Russian mythology teaches that on this very day the fight between the God of Light, Belobog, and the God of Darkness, Chernobog, turns around. After the winter equinox day becomes longer -- Belobog wins, and after the summer equinox it shortens -- Chernobog wins. Each equinox has a celebration associated with it: the winter equinox is celebrated on Koliada's Day, and the summer on Kupala's Day. You see, this sequence of events represents a seasonal change, and it was of the great importance for ancient Russians who were mostly farmers. As Old Russian fairy tales say, " And I had been there, was drinking mead and beer but no drop got to my mouth." It means that I spent all my time talking, which is how it is supposed to be when a person tells fairy tales.