THE QUESTION IS WHICH CAME FIRST THE KERIS OR THE KRIS, I THINK THE KERIS! THEN THE LARGER FORM KRIS EVOLVED FROM IT. DID IT EVOLVE TO A LARGER SIZE IN THE PHILIPPINES BEFORE THE ADVENT OF ISLAM OR AFTER.
I WOULD GUESS THE KRIS WAS THERE BEFORE ISLAM AS THE TAILSMAN CARVINGS ARE UNLIKE ANYTHING FOUND WHERE ISLAM STARTED AND THE BELIEFS WOULD BE UNLIKELY TO HAVE BEEN APPROVED BY THE RELIGION. THE PEOPLE WHO CONVERTED TO ISLAM WOULD HAVE KEPT SOME OF THEIR TRADITIONS ALTHOUGH THEY WOULD HAVE BEEN MODIFIED BY THE NEW RELIGION AND LOST MANY OF THE MEANINGS THROUGH TIME.
AS IN MOST OCEANIC SOCIETYS THERE WERE PROBABLY VERY FEW IRON OR STEEL TOOLS OR WEAPONS IN THE PHILIPPINES BEFORE THE COMING OF THE HINDU ,ISLAM, CHRISTIAN SPANISH AND AMERICAN POWERS. ONLY THE TOP MEN IN AREAS WHERE FORIGN TRADERS CAME WERE LIKELY TO HAVE HAD THEM.
I SUSPECT THE MEANING OF THE ELEPHANT TRUNK AND OTHER CARVINGS WOULD BE MORE EASILY UNDERSTOOD BY GROUPS WHO HAVE NOT CHANGED RELIGION, CUSTOMS OR LIFE STYLE IF ANY SUCH GROUP EXHISTS. I DO THINK THAT THE HINDU BELIEFS AND ANSWERS PREDATE THE FULL DEVELOPMENT OF THE KRIS AND WOULD HAVE BEEN LOST UNDER THE RULES OF ISLAM. THE WAY OF MAKEING KRIS WOULD HAVE CONTINUED AS THAT WAS THE TRADITIONAL WAY THEY HAD ALWAYS BEEN MADE AND WHAT MADE THEM SUCH GOOD WEAPONS. I HAVE ALSO NOTICED SOME DAYAK SWORDS RESEMBLE SOME USED BY THE NAGA TRIBES IN INDIA AND BURMA SO INFLUENCE DEFINITELY CAME INTO THE REGION AT A EARLY TIME.
DISCLAIMER (THESE ARE JUST MY THOUGHTS ON IT WITH NO HARD FACTS TO BACK IT UP BUT IT SEEMS LIKE THE LOGICAL WAY FOR THINGS TO HAVE HAPPENED.) MENTIONING ONE RELIGION IS RISKY AND I HAVE MENTIONED THREE

I HOPE NO ONE TAKES OFFENCE AS NONE IS INTENDED.