Pelagius is a Latinized form of the Greek name Πελάγιος (Pelagios), derived from the word πέλαγος (pelagos) meaning "the sea." This name has been borne by several saints and two popes in Christian history, but it is most famously associated with a 4th-century British theologian whose teachings, known as Pelagianism, were declared heretical by the Catholic Church. Etymology The name Pelagios is of Ancient Greek origin. Its root, pelagos, refers to the open sea or high sea, evoking a sense of vastness and depth. The feminine form is Pelagia, and the Spanish variant is Pelayo. Notable Bearers Pelagius (fl. c. 354–418) was a Christian theologian and ascetic monk who emphasized human free will and moral responsibility, rejecting the doctrine of original sin. He was accused of heresy at the Synod of Diospolis in 415 and later condemned by the Church, largely due to the criticisms of Augustine of Hippo. Pelagius likely came from Britain or possibly Roman Britain, becoming fluent in Latin before traveling to Rome and then to North Africa. Despite the notoriety of his theological views, he remains a significant historical figure whose name carries maritime connotations. Cultural Significance Two popes, Pelagius I and Pelagius II, bore this name in the 6th century, indicating its early usage in ecclesiastical circles. The name's association with the sea may have made it appealing for figures connected to coastal regions or sailors' locales. Meaning: "the sea" Origin: Greek (Πελάγιος) Status: Historic Christian name, borne by saints, popes, and the theologian Pelagius Usage Regions: Ancient Greek, Latin Christian world