@Slavorum, many names which sound “typically Slavic” are not necessarily of Slavic descent. Even though, many of them I consider more with Slavs than others, e.g. Tetiana/Tatiana (Roman). Also the name Svitlana/Svetlana is of Slavic descent, however is a translation of Greek Fotyna.
The same with Ivan. Could be of Hebrew descent, but is specific variant for Slavs.