Sometimes you can encounter names that are Czech in their origin, but are somehow altered to fit other languages (accents omitted, female and male surnames are the same - e.g. Judy Sedivy, from Czech Šedivý).
Use the following guidelines to decide the lemma and tag for such a name:
A name that does not distinguish female and male variant should have just one lemma and a tag with the X (unknown) gender: Sedivy_;S_,t / NNXXX-----A----
A name that has the same spelling as in Czech, should use the Czech lemma: Jane_;Y Janda_;S
A name with altered spelling has its own lemma (with the _,t suffix): Judy_;Y Sedivy_;S_,t