What children's book was this please?

[SollozzoMightNotEvenBeInTheCarSonny]

I think there were 2 books. (Possibly more)

It was about a little girl, an orphan who was raised by nuns. Her parents might have been explorers and I think she had a birthmark shaped like the island she originated from. In one of the books I think she was kidnapped and there was a henchman called Wolfie. I think he might have been Australian and part of the book was set in Australia?

It's driving me crazy.

Any help would be very welcome.

TIA

Did you ever find out? It sounds really interesting.

Unfortunately not. I may try the main board then Reddit.