"1)I have removed Theunis' DVN from the Suffix field while he is positioned under Ferdinandus Appel on the GENi tree (as per suggestions at the beginning of this discussion) because a Botha DVN Suffix will cause mismerges on the Appel tree. "
Please comment
Since we do not know whether Geni supports the biological or de facto tree in case of conflict, I would personally leave Theunis Appel ( with no spouse or children links ) number Ferdinandus Appel and use a "0" in his generation indicator - provided of course that he is also shown as Theunis Botha under Friedrich Botha.