Where does “сомъ” come from?

сомъ (Old Church Slavonic) comes from Proto-Slavic sòmъ — catfish.

Ancestry of “сомъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicsòmъcatfish

Words derived from “сомъ

Every word from Proto-Slavic sòmъ
сомъ — Etymology, Origin & Word History | Etymology Explorer