Nennius (or, variously: Ninnius; Nemnius**) reveals himself as a possible author of the Historia in a prologue in some of the copies still in existence. He notes that he is a pupil of Elvodug (Elffodw). The Welsh Annals (Annales Cambriae: see Other Works) note Elvodug twice: in 768 CE he was responsible for ensuring the date of Easter was correctly calculated in Wales, and his death is noted in 809 CE. This gives us a rough time for Nennius to have lived. There is an additional work (Oxford, Bodleian Library Auct. F.4.32 (S.C.2176) fo.20r) from 817 CE* by a Nennius, which is an alphabet parodying English runes, made up to refute an English (i.e. ~Saxon) scholar who suggested the British (i.e.~Welsh) had no alphabet of their own*. Further details on this can be found in Robert Vermaat's excellent summary at Vortigern Studies. On the basis of the above, and the manuscript dates1, classical suggestions that the writer is the Nennius mentioned in Geoffrey of Monmouth's Historia Regum Britanniae (i.17+) (Other Works) have largely been abandoned.