What about the leader (Bapak Muhammad Subuh Sumohadiwidjojo) of the group (Subud) that Fuddy belonged to, and... ?
Just throwing a first thought (that came to mind) out there-
Assuming Bapak’s folks are all Asian, that would be four out of 0’s eight great grandparents from Bapak’s side of the family.
Then whoever the mom was, she would have two grandparents Asian, one black, and one white & thus the great grandparents of 0 from that side would be Asian, Asian, black, white.
That’s one possible combination.