Tertullian, approximately 160-approximately 230

Tertullian (; Latin: Quintus Septimius Florens Tertullianus; c. 155 – c. 220 AD) was a prolific early Christian author from Carthage in the Roman province of Africa. He was the first Christian author to produce an extensive corpus of Latin Christian literature and was an early Christian apologist and a polemicist against heresy, including contemporary Christian Gnosticism. Tertullian was the first theologian to write in Latin, and so has been called "the father of Latin Christianity", as well as "the founder of Western theology". He is perhaps most famous for being the first writer in Latin known to use the term trinity (Latin: trinitas). Tertullian originated new theological concepts and advanced the development of early Church doctrine. However, some of his teachings, such as the subordination of the Son and Spirit to the Father, were later rejected by the Church. According to Jerome, he later joined the Montanist sect and may have apostasized; however, modern scholars dispute this.