Life and Martyrdom
According to the synaxarion, Susanna was the daughter of the presbyter Gabinus and the niece of Caius, bishop of Rome. The emperor Diocletian, to whom the family was related, heard reports of her virtue and beauty and resolved to give her in marriage to his co-emperor Maximian. He sent his kinsman, the dignitary Claudius, and then his own brother Maximus, to negotiate with the priest Gabinus.
Rather than accomplishing the match, both envoys were converted: Claudius, together with his wife Prepedigna and their sons Alexander and Cythius, accepted baptism after conversing with the devout family. When Diocletian learned of his relatives' conversion he sent them into exile, where they were burned at Ostia, not far from Rome, and their ashes were cast into the sea. Pressed to sacrifice to the idols, Susanna answered, 'I offer myself in sacrifice to my Lord,' and was beheaded by a man named Macedonius. The room in which she died was afterward consecrated as a church by Bishop Caius. Her father Gabinus and her uncle Caius also met a martyr's end, Caius dying in the year 296.