Question: What manuscript survived the medieval Welsh poem consisting of a series of elegies to the men of the Brittonic kingdom of Godddin,  who fought a battle around AD 600 between a force raised by the Gododdin, a Brythonic people of the "Hen Ogledd" or "Old North" of Britain, and the Angles of Bernicia and Deira?
Sentence (from "Cinuit of Alt Clut"): Cinuit (Welsh: "Cynwyd" ) may have been an early ruler of the Brittonic kingdom of Alt Clut, later known as Strathclyde, in Britain's "Hen Ogledd" or "Old North".
Relevant evidence: No