ap Gwylog (the king of Powys) and Sanan(t) ferch Nowy, Cloten's younger sister; that her grandson Nowy Hen was the father of Gruffydd; alternatively, that (as in Jesus College Manuscript 20), Nowy Hen had a son named Elisse, whose daughter was Sanan(t); Sanan(t) and an unnamed king of Powys were the parents of Gruffydd; alternatively, that Rhain had three or four sons (Tewdos, Naufedd Hen, Tewdwr, and possibly also Elisse) between whom the land was divided; Dyfed going to Tewdos (whose son was the Maredudd who inherited Dyfed), Naufedd Hen receiving Cantref Selyf of Brycheiniog, Tewdwr receiving Cantref Tewdos, and Elisse (or Naufedd Hen, if Elisse did not exist) receiving the remainder of Brycheiniog. In close union with this alternative, that Tewdwr's son and heir was also named Elisse, and his daughter Sanan(t) married Nowy, an unidentified king, whose son was Gruffydd; Naufedd Hen, meanwhile, was the great-great-grandfather of a man named Elisse ap Gwylog (e.g. as in Peniarth Manuscript 131). Complicating matters further, Tangwydd ap Tegid, the king of Ferlix (the adjacent realm at the heart of Rhwng Gwy a Hafren) gained a claim on Brycheiniog by marrying a daughter of Elwystl, or of Rhain's grandson Elisse ap Tewdwr / Elisse ap Nowy Hen, who had only daughters. Geoffrey of Monmouth identifies Gruffydd (as Grifud map Nogoid - i.e. Gruffudd ap Nowy) as one of the princes present at the coronation of King Arthur. The Harleian Chronicle states that in 848 (about the time of Gruffudd, or his son Tewdwr), Ithel ap Hywel (king of Gwent) was killed by men from Brycheiniog in the Battle of Ffinnant (probably referring to either the Ffinnant near Soar in Brycheiniog, or the Ffinnant near Duhonw in Buellt); the cause and participants of the battle are not otherwise reported, but the Chronicle of the Princes states that the killing of Ithel had become infamous as treachery, possibly implying that he had been on the Brycheiniog side of the battle. Subsequent kings of Ferlix descended from Tangwydd are identified in the Book of Baglan as also ruling Brycheiniog, even though this raises the question of how Gruffudd's descendants could rule it at the same time; possibly this is what led to the Battle at Ffinnant. Dependency Gruffydd (whoever his parents were), had a grandson – Elisse ap Tewdwr (also known as Elisedd) – who is described in the records as being king of Brycheiniog