Favonius was also a Roman nomen.
No doubt inspired by the tombstone, the computer game Dark Ages of Camelot[?] features a powerful undead monster named Favonius Facilis.
... on May 24, 1864. On May 10, 1873, at his request, he was permitted to travel to Molokai to help the lepers who had virtually nothing to keep them warm or fed. ...