u/Deneverka

I'm aware that the word кіста means "cyst" in Belarusian, but I saw it listed on what seemed like a serious names site alongside many other genuine Belarusian names and am very curious to know if this was ever a folk-type of nickname from the old days that's now obsolete, or just an outright error (perhaps a name from a neighboring Slavic language like Polish?). Are there any female Belarusian diminutives with a similar sound, derived from names like Казіміра, Канстанцыя, or Крысціна? Are there any rare, obscure, or folk names a similar diminutive could be derived from?

Вялікі дзякуй!