Bufo (n.)

toad genus, from Latin bufo "a toad," an Osco-Umbrian loan-word, perhaps from PIE *gwebh-, a root denoting sliminess and also forming words for "frog" (source also of Old Prussian gabawo "toad," Old Church Slavonic žaba "frog," Middle Low German kwappe "tadpole," German Quappe).