Actually pana is from proto-bantu *pana
The Greek etymology is very unlikely, and the meaning of παν is quite different from "wide"
@newyuvala I think it comes from Greek pan- (παν-), meaning "all; every(thing)" (e.g. panacea: "all-healing"; Pangaea: "all-Earth"; pansexual: "attracted to all sexes.")
The Greek etymology is very unlikely, and besides παν has quite a different meaning from "wide"