What is "evasius"

Saint Evasius (; probably third century AD) is believed to have been a missionary and bishop of Asti, in north-west Italy. He was forced to flee to the great Padan forest known as the Selva Cornea, where he and numerous followers were beheaded by pagan, or alternatively by Arian, enemies in the area of what is now Casale Monferrato. He is venerated as a saint of the Roman Catholic Church and is the patron of a number of towns in Piedmont and Lombardy. His cult is liveliest at Casale, where his remains are conserved in the cathedral dedicated to him.