traditor

noun

1. A deliverer; a name of infamy given to Christians who delivered the Scriptures, or the goods of the church, to their persecutors to save their lives.

   “A number of bishops cooperated with him , piqued that they had not been called to the ordination of Cæcilian . Seventy bishops , a number of whom had been traditors , met thus together at Carthage , to depose Cæcilian.”