Webum > Society > History > Historians > Nennius Historia Britonum Latin text of Nennius's history of the British people. Edited by Theodore Mommsen. Medieval Sourcebook: Nennius, Historia Brittonum Complete text from the Giles translation and other sources. Nennius, British Historian Short biography of the 9th-century Celtic historian describing his works and comparing him to an Anglo-Saxon counterpart, the Venerable Bede. Help build the biggest human edited directory on the internet Add your website - Open Directory Project - Become an editor