naturalist, that sounds very confusing!
It reminds me of the "Filipino bolo," which can be many different shapes and sizes, and used for many different purposes (agricultural tool, brush clearing, wood cutting, general purpose jungle knife, weapon, etc.).
Again, we come up against the futility of trying to understand the "name game" with regard to local usage. An item is called by whatever term its owner thinks it should be called based on common usage within the local culture. This legitimizes the designated name (even if it makes little sense to outsiders, such as collectors).