Mamertinus of Auxerre

There was another Mamertinus (Mamertus) who was bishop of Vienne and also venerated as a saint.
Saint Mamertinus

Saint Gregory I (left) and Saint Mamertinus (14th century French manuscript)
Died ~462 AD
Honored in Roman Catholic Church
Feast March 30
Attributes depicted lying in a cave surrounded by serpents or exhorting monks, lying on a mat in his cell before his death

Saint Mamertinus of Auxerre (French: Saint Mamert) (d. ~462 AD) was a monk and abbot. He was converted by Germanus of Auxerre and became a monk at the monastery of Saints Cosmas and Damian in Auxerre. He later served as its abbot.

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