Actually, wasn’t it Tertulian? Today, Tertulian is considered the Founder of Western Theology, and is known as the Father of Latin Christianity.
Tertulian also ORIGINATED and advanced the" Trinity", the oldest extant, which was adopted as Creed (correct belief) in 325 AD, by 318 Fathers.
At first, the changes for a “Trinity” Tripartite structure was rejected, as heresy, by the Church at large, but, was later accepted as Christian Orthodoxy…
Tertulian was the Latin writer, creator of…and first to use the latin term, “Trinity”.
Tertulian was also responsible for the formal exposition of this Trinitarian (Latin Trinity) theology.
The revised “Trinity”, another Latin version was formally adopted by the First Council of Constantinople as Creed (correct belief) in 381 AD by 150 Fathers…