There is speculation that those two that were banished to the mainland did, perhaps contribute thier genetics to the natives but it's been thought that more than likely that the genes found among the aboriginal population might have come from the survivors of the Zuytdorp shipwreck.
I find it ironic that the soldiers sent away to "find water" actually did and the voyage of the longboat was a maritime feat in it's own right, all aboard surviving the 33 days at sea to reach the city of Batavia.