Sub-Roman Britain (Cavalry etc)

[cagwinn]

The stone inscription from Wales records the name of a man called Uoteporix - this is not the same name as Gildas' Uorteporix (or Uortiporius, as it is usually Latinized), though they do look similar (and are commonly confused by all but the most careful of readers).

Yes
I think however it is quite likely that this was one man, the ruler of Dyfed circa 540 AD. Especially because Uoteporix bores the title of Protector, which is tied to the Dyfed dynasty in the welsh genealogies. Even if those are late this seems to be a good evidence.

Yes, but the Protec/tor does not appear in every Welsh version of the genealogy, is entirely abesent from the Irish versions, and is separated from Gurtepir by seven or eight generations. Additionally, the series Nimet...Dimet...Maxim guletic...Protec...Protector looks like a marginal gloss that was mistakenly interpolated into the genealogy, as if ihey were personal names (Maxim is certainly a late addition to the genealogy; the spelling of his name was not subjected to Brittonic sound changes, as we would expect if this was a genuine, early genealogical tract [compare Aircol, which is a Brittonicized form of Latin Agricola]). Nimet is the Old Welsh spelling of nyfed, which meant "priveleged person" and Dimet is the Old Welsh spelling of Dyfed, so a phrase *Nimet Dimet would be refering to a high-status person from Dyfed. According to Nikolai Tolstoy and Leslie Alcock, the "Protector" here was Clotri [Irish Corath], who received the title from Magnus Maximus/Maxim (which would make Clotri/Corath the "exalted person" of Dyfed) See:
[url:1yxpip4e]http://books.google.com/books?id=q2U3i1X8B50C&pg=PA105#v=onepage&q&f=false[/url]
In order for Gildas' Uortipori and the genealogies Guortepir/Gwrdebyr/etc. to be the same man as Uoteporix from the stone inscription, you must propose that Gildas and the genealogists completely botched the spelling of the man's name - ths is, of course, quoite possible with the genealogies, but less likely for Gildas, I think. I doubt the the engraver of the stone inscription botched the epelling of the name, either (if one wants to propose that Uoteporix stands for Uorteporix).