Notes
Ngulu (Executioner's sword) from the Ngombe (a Bantu tribe on the Conga River) in Africa. Ngulu may have originally been used in ceremonies where slaves were executed or sacrificed (and perhaps cannibalized), but by the early 1900s these practices were outlawed. The Ngulu became symbols of prestige. (Goats were perhaps used as substitutes in similar ceremonies).
Original attribution was Phillipines, but I do not believe this is correct. Should be African, specifically to people's of Bantu tribe the Ngombe, Ngala, or Doko.