However, the concept is found in the writings of a wide range of pre-Reformation theologians including the Church Fathers.
[2][3] The term extra Calvinisticum (Latin for "the Calvinistic beyond/outside") is a theological terminus technicus given by Lutheran scholastic theologians around 1620.
[4][5] The doctrine is named for and associated with John Calvin, but is commonly found in the Church Fathers and is prominent in Augustine's Christology.
[6] E. David Willis demonstrates the existence of this doctrine in the writings of Augustine of Hippo, Peter Lombard, John of Damascus, Gregory of Nazianzus, Thomas Aquinas, Duns Scotus, Gabriel Biel, and Jacques LeFevre d'Estaples.
[2] Andrew M. McGinnis furthers the research and demonstrates evidence of the doctrine in the writings of Cyril of Alexandria.