Vofionus Grabovius is the third and least transparent member of the Grabovian triad of Iguvium. Because the triad of Jupiter, Mars and Vofionus parallels the Archaic Roman triad of Jupiter, Mars and Quirinus, scholars from Georges Dumézil onward have read Vofionus as the Umbrian equivalent of Quirinus, the god of the gathered citizen-body, though the etymology of his name remains debated. In the lustration he receives three oxen with a white forehead before the Veian Gate, the third of the three gates of the city. Together with Jupiter and Mars he forms the protective triad whose shared epithet Grabovius marks them as guardians of the sacred boundary of Iguvium.