Baring-Gould’s sources: Mentioned in Roman Martyrology, and in those of Bede, Ado, Notker, Maurolycus, &c. All known of her is contained in the Martyrologies.

This Saint was the wife of S. Flavian, a martyr. She was one of the few who suffered in the reign of Julian, the Apostate; having been sentenced by Apronianus, præfect of the city, in Rome, along with her daughters, Demetria and Bibiana. S. Flavian, her husband, was crowned on the 22nd December; and she followed him shortly. She was sent to the house of a certain Faustus, who desired to have her in marriage; but she refused to become his wife, and converted him to the faith. He was baptized by S. John the priest, who is commemorated on June 23rd. Faustus was executed, and his body cast to the dogs; but Dafrosa saved it, and buried it secretly at night. Then, in a dream, her husband Flavian appeared to her, and called her to follow him. And at the expiration of five days, whilst engaged in prayer, she migrated to her heavenly country.