Can anyone name this ?

[Royston]

Thanks for the information gentlemen.
I have looked in Stones and the closest match is the Buyo. It's strange that I had never considered the similarity to a Piso Raut. The drawing in Stones makes it more obvious.
Handling as suggested does make it a handy carving tool. I don't think I will be using it though !
The blade is not concave / convex, but tapers just like most of the Barongs I have.