Where does “Soňa” come from?
Soňa (Slovak) comes from Russian со́ня, from Russian сон, from Proto-Slavic sъ̀nъ, from Proto-Balto-Slavic supnas, from Proto-Indo-European supnós, from Proto-Indo-European swóp-r̥ ~ swép-n̥s, from Proto-Indo-European swep- — to sleep.
Ancestry of “Soňa”, step by step