Agnellus of Naples was a 6th-century Basilian monk and Augustinian priest who lived in Naples. Born in 535 to a wealthy family, he initially lived as a hermit before using his inheritance to fund charitable efforts, including the establishment of a hospital for the poor. He gained significant local renown, even appearing to defend Naples with a cross during a Lombard invasion in 581. After a period of seclusion, he returned to the city to serve as an abbot at the monastery of Gaudiosus, where he died in 596.