In Christian Gnostic religious history, the Colarbasians were a supposed sect of the 2nd century, deemed heretics, so called from their leader Colarbasus, a disciple of Valentinus. Colarbasus, along with Marcus, another disciple of Valentinus, was said to maintain the whole plenitude, and perfection of truth and religion, to be contained in the Greek alphabet; and that it was for this reason that Jesus was called the Alpha and Omega.