Not much to add, I agree with Mabagani's points (whats new).
Though I would add, to add even more confusion to the mix (again whats new), there is a strong possibility that meaning has changed over time. Eg. when the keris first began to shift into the kris perhaps there was one meaning (eg. elephant and dragon), but in later kris perhaps the meaning has changed. Particularly since there are many forms of fretwork that are not dragon-esque or curly or etc...
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