For ten points, name this label which can be applied to anyone who publicly rejects a faith after originally accepting it.
This term has been used to describe people who leave monastic or clerical orders without permission. In the third century, it was used to label those expelled from the Roman Catholic Church as part of the Donatist controversy. In the fourth century, it was used as an appelation for the Roman Emperor Julian, who converted from Christianity to paganism. For ten points, name this label which can be applied to anyone who publicly rejects a faith after originally accepting it.
This term has been used to describe people who leave monastic or clerical orders without permission.
{apostate} (accept {apostasy})