as the 'r' in the first syllable would give the name different meaning. Rhys argued that the two individuals were the same person, saying that the 'r' had been added at a later date, and offering several suppositions as to how this might have happened. However, he was working before the twentieth century advancements in the study of ancient Celtic languages, and his philological conclusions are suspect. More recently, Patrick Sims-Williams notes that the two names cannot refer to the same individual due to differences in their etymologies, adding that dating the stone to the time of Vortiporius may not be valid because it relies on the inexact dating of manuscripts and their transcriptions. Geoffrey of Monmouth Geoffrey's mention of Vortiporius is contained in a brief chapter titled "Uortiporius, being declared king, conquers the Saxons". He says that Uortiporius succeeded Aurelius Conan, and after he was declared king, the Saxons rose against him and brought over their countrymen from Germany in a great fleet, but that these were defeated. Uortiporius then ruled peacefully for four years, beings succeeded by "Malgo" (Maelgwn Gwynedd). Geoffrey's fertile imagination is the only source of this information. The Myvyrian Archaiology of Wales, an early 19th-century collection of Welsh histories, repeats Geoffrey's account, referring to him as 'Gwrthevyr' (though Vortiporius' proper Modern Welsh spelling is Gwrdebyr; here the name has been confused with that of Vortimer, the son of Vortigern). In his Britannicarum Ecclesiarum Antiquitates, James Ussher also repeats the account, attributing the information to Geoffrey. Family Vortipor was a son of Aergol Lawhir, so a grandson of Triffyn Farfog. He had a son named Cyngar. See also Vortimer, also known as Gwrthefyr in Welsh sources Citations References — English translation — in Latin 6th-century monarchs in Europe Monarchs of Dyfed 6th-century Irish people