Bonosus was a presbyter under Bishop Paulinus of Trier who was exiled in AD 354 for refusal of condemning Athanasius of Alexandria. He died in AD 358 in Phrygia. Bonosus probably refused to enter the communion with repentant bishops, who had signed the creed in Rimini in AD 359, at the council of Paris in AD 360 (see Munier 1963: 32-34; PCBE, Gaul, v. 1, Bonosus 1, v. 2, Paulinus 1). The catalogues of the bishops of Trier known from the 10th and 11th-century copies mention as the successor of Paulinus a certain bishop Bonosus or Bonosius who was supposed to rule between AD 358 and AD 374 (the year in which the episcopacy of Britto begun, see PCBE, Gaul, v. 1., Britto). It is possible that this bishop is identical with the presbyter Bonosus (PCBE, Gaul, vol. 1, Bonosus 2; this is apparently accepted by Fernandez Ubiña 1997: 107), but it would be surprising that the presbyters Marcellinus and Faustinus did not mention in AD 383/384 the ecclesiastical promotion of their hero. The PCBE suggests also the possible identification of the presbyter Bonosus with the father of Bishop Rusticus of Narbonne (CIL XII, 5336; PCBE, Gaul, vol. 1, Bonosus 3).