Where does “сонца” come from?
сонца (Belarusian) comes from Russian со́лнце, from Old East Slavic сълньце, from Proto-Slavic sъlnьce, from Proto-Balto-Slavic *súlˀnis, from Proto-Indo-European sóh₂wl̥ — sun.
сонца (Belarusian): the sun
Ancestry of “сонца”, step by step