Hi Ian,
It's possible that the man is from Timor, but there's a bit of evidence against him.
As I pointed out above, the Timorese look Papuan, which means dark skin and frizzy hair. Similarly their blades apparently don't look like this specimen.
A sample handle (admittedly on a replica klewang) from the archives is shown
here
So far as I can tell, this handle is the same as Draeger shows in a sketch of a timorese parang.
I like the idea of "cana" being short for Kanaka--but I don't think we're in the right part of SE Asia yet.
F