Thanks for bringing this issue up, Helmut. Ever since I became aware of the Czech naming guidelines, I have been rather bothered by them. In particular, the rules on adding suffixes to feminine names seem problematic. For that reason I have not added as many profiles for Bohemians as I otherwise would have.
I think the rules for LNAB should be kept simple and conform to the general WikiTree policy of "the spelling that appears in a birth record should be used for the Last Name at Birth....".
In my mind, there are several good reasons for doing things this way. One is to avoid confusion and duplication of profiles. Another is to avoid presentism or applying standards from some other time than the one the person was born into. Finally, regardless of whether there is an active Czech Roots Project or not, many relevant profiles have been, and will be, created by WikiTreers who are not in the project and aren't going to read or follow its naming guidelines
edited for typo