Athanasians
Watson's Biblical & Theological Dictionary [1]
the orthodox followers of St. Athanasius, the great and able antagonist of Arius. The Athanasian Creed, though generally admitted not to be drawn up by this father, (but probably, as Doctor Waterland says, by Hilary, bishop of Aries, in the fifth century,) is universally allowed to contain a fair expression of his sentiments. This creed says, "The Catholic faith is this: that we worship One God in Trinity, and Trinity in Unity: neither confounding the persons, nor dividing the substance. For there is one person of the Father, another of the Son, and another of the Holy Ghost. But the Godhead of the Father, of the Son, and of the Holy Ghost, is all one; the glory equal, the majesty co-eternal. Such as the Father is, such is the Son, and such is the Holy Ghost;" namely, "uncreate, incomprehensible, eternal," &c. The true key to the Athanasian Creed lies in the knowledge of the errors to which it was opposed. The Sabellians considered the Father, Son, and Holy Spirit as one in person;—this was "confounding the persons:" the Arians considered them as differing in essence—three beings;—this was "dividing the substance:" and against these two hypotheses was the creed originally framed. And since every sect was willing to adopt the language of Scripture, it was thought necessary to adopt scholastic terms, in order to fix the sense of Scripture language. Many, however, hold the doctrine of the Athanasian Creed, and approve its terms, who object to its damnatory clauses. See Arians .
Charles Buck Theological Dictionary [2]
Those who profess the sentiments held in the Athanasian Creed.
See CREED.