Once again, we find ourselves struggling to put a name to a weapon. I guess we're talking about two things here, really. First, what do we call this thing and, second, where does it fit into our current understanding.
I tend to try and neatly catagorize weapons and give them names that, even if not strictly accurate, allow me to differentiate between forms. Mark is correct: probably the best name for the eBay example is "Kachin sword". But without more information from someone in the region, we're left to our own devices.
