The narrative currently says her father is de Creoun. Is this not correct? The data field contains no documentation, so it is pure fiction unless it is backed up by sourced material in the biography.
If her father is de Creoun, then I don't see the problem -- her LNAB is precisely correct by WikiTree standards.
If her father is someone else, then that should be written up and documented, and the LNAB can be corrected to match the documented fact. In my very firm opinion, no changes should be made in the data field until AFTER the changes have been made in the biography; the data field is derivative.
If her father is really unknown, then her LNAB is probably "Unknown."