There is no wild creature in the northern United States that a man will run away from so fast as from a bald-faced hornet.
Old English hyrnet, hurnitu "large wasp, beetle," probably from Proto-Germanic *hurz-nut- (cf. Old Saxon hornut, Middle Dutch huersel, Dutch horzel, Old High German hornaz, German Hornisse "hornet"), from PIE imitative (buzzing) root *krs-, as preserved in Old Church Slavonic srusa, Lithuanian szirszu "wasp." On this theory, the English word (as well as German Hornisse) was altered by influence of horn, to suggest either "horner" (from the sting) or "horn-blower" (from the buzz). Cf. also Old Saxon hornobero "hornet," literally "trumpeter."