It mostly is for if it is real name, but wikipedia can be trusted for meaning- as person who has did work on wikipedia they have very strict guidelines...
Most of these sources are some of first things that will show up when searching in Russian / Ukrainian on Yandex Browser, so not obscure!
I forgot about this also
https://statusname.ru/ (in Russian)
https://www.wiktionary.org/ (sister of wikipedia)
What type(s) of name are you submit? (Forename, surname, place name) it can help me help you.