Materni
Martyrological notice
The historical Roman Martyrology commemorates Materni on 14 September. The Latin notice identifies the record as bishop and apostle. The source places the commemoration at Treviris.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Treviris sancti Materni Episcopi, qui fuit discipulus beati Petri Apostoli; ac Tungrenses, Colonienses et Trevirenses, aliosque finitimos populos ad Christi fidem perduxit.