Good morning y'all. Beautiful piece that you have there! I am not an expert by any stretch but do love some research! The pattern on the grip looks similar to some I've seen on Fijian weapons but it's not exactly unique enough to place it as a place of origin.
For the rest of the weapon, I found a few examples of a weapon referred to as a Wawa Votovotoa. I think there are several examples in threads on this site. They seem to resemble your weapon but i can't find enough examples to make a really good case that it's a match to yours. But it is Fijian in origin which would go with the grip pattern. Once again, this is a new area to me so I appreciate your patience.