Hello Alam, thank you for your reply, I've seen your keris in a other thread before. The blade looks indeed very similar.
Hello Kai, yes the pommel from the sheat is from ivory.
I don't know how much material it will need to identify it by DNA analysis but I think it's possible to take out some substance from the inside of the warangka. But I don't know where it's feasible to get a analysis and for which amount.