Originally Posted by Rick
Speaking for myself only .
I expect that this form of pommel is uniquely Philippine in origin .
I cannot recall encountering this form in Indonesian hilts I have seen; have others here ?
I think this is a most difficult question to answer because the origins of the so-called kakatua hilt are probably lost in time and we may never know for sure. Certainly, the same form of hilt exists beyond the Philippines in other Malay cultures--it is often seen in N. Borneo, Sarawak, the Sultanate of Brunei, and even on some pieces from what is now mainland Malaysia. I don't believe we can say with any degree of confidence where this form of hilt originated.
It is conceivable that in the northward migration and transformation of the Indonesian keris to the Moro kris that it underwent changes along the way. It would not surprise me if, for example, the kakatua style hilt actually arose in the Sultanate of Brunei which held sway over the Muslims of the Philippines for a century or two, before and after the arrival of the Spanish.