Quintus Septimius Florens Tertullianus was a prominent Christian writer and theologian from the early days of the religion. Although he is primarily known by his full name, there are various synonyms for Tertullian that scholars and writers may use, such as Tertullianus, Quintus Tertullianus, or simply Tertullian. His works, which include Apologeticus, Adversus Marcionem, and De Carne Christi, among others, were influential in shaping Christian doctrine and apologetics. Tertullian's writings provide insight into the early development of Christian theology and the challenges the religion faced in the early centuries. Despite his later association with the heretical Montanist movement, Tertullian remains an important figure in the history of Christian thought.