(Gualfridus, Galfridus, Gaufridus) was first archdeacon of Monmouth, afterwards (1152) bishop of St. Assaph. He died in 1154. He wrote a Chronicon sive Historia Britonum in 12 books, supposed by some to be a translation from the Welsli. It is one of the sources for the legendary history of Britain. The first edition is that of Paris, 1568, 4to; the latest, that of J.A. Giles (London, 1844, 8vo). Translated, The British History, from the Latin by A. Thompson, Esq. (Lond. 1718, 8vo; new ed. revised bay J.A. Giles, Lond. 1842, 8vo); also in Bohn's Antiquarian Library. See Wright, Biog. Britann. Lit., Anglo-Norman Period, pages 143-149.