Alvaro, Pelagio a Spanish theologian, was born near the close of the 13th century. He studied canonical law at Bologna; was a pupil of Scotus and the companion of William Ockam and Raymond Lully. He became grand-penitentiary of pope John XXII of Avignon; bishop of Sylves, in Algarves; and apostolic nuncio to Portugal. He died at Seville in 1352. He wrote, De Planctu Ecclesice Libri Duo (Lyons, 1517; Venice, 1560). This work, commenced at Avignon in 1330 and completed in 1332, set forth ultramontanism more prominently. Trithemius attributes to him, Speculum Regumn Liber Unus: — Super Sententias Libri Quatuor: — Apologia: — and other unpublished works. See Hoefer, Nouv. Biog. Generale, s.v.