Mamerti
Martyrological notice
The historical Roman Martyrology commemorates Mamerti on 11 May. The Latin notice identifies the record as bishop. The source places the commemoration at Viennae, in Gallia.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Viennae, in Gallia, sancti Mamerti Episcopi, qui, ob imminentem cladem, solemnes ante Ascensionem Domini triduanas in ea urbe Litanias instituit; quem ritum postea universalis Ecclesia recipiens comprobavit.