Some researchers assert that there’s no proof of a white god, Bialobog, despite pairs of mountains being named after Bialobog and Czarnobog, the black god.  I agree with them to the extent that I believe Bialobog and Czarnobog were simply titles for the gods who presided over these two parts of the year.  

Bialobog (bee-AH-LOO-boog) - (Bialbog, Bialun, Biel-Bog, Bielobog, Bielboh, Bilobog, Belbog, Belobog, Belbuk, Belbog, Bel Bog, Belun, Belye Bogi...