May I respectfully point that most diminutives (like
Nadia,
Lena or
Liza) are rarely used as full legal names in Russia, and pet forms ending in -ka (excluding -ika) are strictly informal. Same for
Dunyasha,
Katyusha and
Verusha. Is it possible to mention the difference in the database to avoid confusion?
There are also a lot of unmarked rare/archaic names.
My PNL
http://www.behindthename.com/pnl/111792