Hello Tom ,I do not know a specific tribe origin.Things like these come from a vast region.The southern Sudan to south Uganda.These are lumped in with other Knives as wrist and finger knives.I have tried all ways of using this knife held or attached to my fingers,it does not work.Held as illustrated, a great amount of control can be obtained by wrist movement,enough for quick delicate cuts in one action.The truth be told they are most probably quite general purpuse and the unpleasant job is done with anything sharp.Tim
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