Pelagius (c. 360 to 435) was a British monk whose theology is known as Pelagianism.
Pelagius may also refer to:
Pelagius of Constance (c. 270–c. 283), Pannonian child martyr Pope Pelagius I (died 561), reigned 556–561 Pope Pelagius II (died 590), reigned 579–590 Pelagius of Asturias (c. 685–737), first king of Asturias Pelagius the Hermit (fl. 9th century), Spanish hermit Pelagius of Cordova (c. 912–c. 926), Galician Christian child-martyr Pelagius (bishop of Lugo) (died 1000) Pelagius of Oviedo (died 1153), Spanish bishop of Oviedo Pelagius Galvani (c. 1165–1230), or Pelagio Galvani, Spanish cardinal Alvarus Pelagius (c. 1280–1352), Galician canonist
See also Pelagio (disambiguation) Pelayo (disambiguation) Pelagianism