This article is within the scope of WikiProject Wales, a collaborative effort to improve the coverage of Wales on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.WalesWikipedia:WikiProject WalesTemplate:WikiProject WalesWales articles
This article is within the scope of WikiProject Former countries, a collaborative effort to improve Wikipedia's coverage of defunct states and territories (and their subdivisions). If you would like to participate, please join the project.Former countriesWikipedia:WikiProject Former countriesTemplate:WikiProject Former countriesformer country articles
Seisyllwg is within the scope of WikiProject Celts, a collaborative effort to improve Wikipedia's coverage of the ancient Celts and the modern day Celtic nations.
If you would like to participate, you can edit this article or you can visit the project page, where you can join the project and see a list of open tasks or take part in the discussion. Please Join, Create, and Assess.CeltsWikipedia:WikiProject CeltsTemplate:WikiProject CeltsCelts articles
Lloyd is normally great, but see this discussion of his sources (including using the Mab. & Iolo's forgeries) for why this "hard to establish" kingdom quite probably didn't exist and was a later fabrication to justify Cadell and Hywel's extension of their Ceredigion holdings into Ystrad Tywi.
Inter alia, Seisyll's own kid is recorded calling himself king of Ceredigion, not "Seisyllwg". — LlywelynII 22:59, 19 February 2013 (UTC)[reply]
As I said at Talk:Hywel Dda, that source is a self-published source and isn't usable here. As this article says, citing the Celtic Encylopedia, the name "Seisyllwg" doesn't appear in early sources and there's no reason to think Seisyll formed it. However, it's pretty clear that by Hywel's time the kings held Ystrad Tywi as well as Ceredigion. The modern literature continues to use "Seisyllwg" as a conventional term for the territory comprising both Ceregion and Ystrad Tywi; as such we shouldn't avoid it, though we can certainly explain it, as is done here.--Cúchullaint/c 23:29, 19 February 2013 (UTC)[reply]
