I just received the marriage certificate and some other confirmation, that it is indeed Olivia Kempf, daughter of Johann and Olavia.
The wedding cert to Cyril Fortescue 1897 lists Olivia as an actress (and Cyril as an actor).
Apparently there is quite a bit of information on the family in the book by William McClelland: Cobars Founding Fathers - which I have ordered - including the attached image.