No reliable source names him he is a later opposite
Resonance
Those seeking fortune and favour
Symbols
White stoneSunWhite horseBowl
Mythology Summary
Belobog has no reliable pre-Christian source: the name first appears in 16th-century writing, in Johan Lindner (c. 1530), Thomas Kantzow's Pomeranian chronicle (1538) and Sebastian Münster's Cosmographia (1550), each of them pairing a white god with Helmold's black one. Most scholars take him as a later invention formed by opposition to Chernobog, and some reject him outright; a minority treat the pair as an authentic Polabian dualism, and the 19th-century Slavic dualism that followed from it is not accepted as an element of Slavic religion. Any practice built on him is modern, and the honest reading is that the good god of the feast was never given a name we can recover.
Modern Practice
Modern work with Belobog is reconstruction and should be labelled as such: gratitude at sunrise, bread and honey, the white stone on the table, and the good fortune that is thanked rather than commanded. It is practice for the goodwill one already has, not a cult with a lineage.