Saturninus is called Saturnilus by Hippolytus, Epiphanius, and Theodoret, and his followers Saturnilians by Hegesippus, quoted in chap. 22, below. Irenæus (Adv. Hær. I. 24) and Hippolytus (VII. 16) give accounts of the man and his doctrine which are evidently taken from the same source, probably the lost Syntagma of Justin Martyr. Neither of them seems to have had any independent information, nor do any other writers know more about him than was contained in that original source. Irenæus was possibly Eusebius’ sole authority, although Irenæus assigns Saturninus only to Syria, while Eusebius makes him a native of Antioch. Hippolytus says that he “spent his time in Antioch of Syria,” which may have been the statement of the original, or may have been a mere deduction from a more general statement such as Irenæus gives. In the same way Eusebius may have needed no authority for his still more exact statement.