Why does barba, the Latin word for beard, not begin with an f?
According to the First Sound Shift or Grimm's Law, Indo-European bh-
became f- in Latin and b- in Germanic.
I made a list of b- (Old English & Old High German) and f- (Latin)
cognates, and all corresponded as expected except barba.
http://snusos.leech.at/ (Go to this link for examples.)