Modalism
βThe letters of Ignatius lay before Servetus. Before him, too, were Tertullian and Irenaeus. The latter in one passage equated Logos or mind with Father. The certaintly sounds modalistic.β
(Bainton, Roland H. Hunted Heretic: The Life and Death of Michael Servetus 1511-1553. Boston: The Beacon Press, 1953, 45)