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.
... was born in Tremeloo, Belgium, the son of a farmer. He entered the novitiate of the Fathers of the Sacred Heart of Jesus and Mary[?] at Louvain, and was admitted to the ...