🇨🇿 Czech Republic

Name must exist in the calendar or be verifiable

Preference is given to names in the Czech name-day calendar, but foreign names are accepted with proof.

Diminutives are not allowed

Nicknames and short forms (e.g., Pepa instead of Josef) cannot be registered.

Name must match the child's sex

The name must clearly indicate the child's gender.

Female surnames take the -ova suffix

By law, female surnames are feminized with -ova, though exemptions exist for foreign nationals.