Geraint son of Erbin through a variety of subsequent sources. Later genealogies associate him with southwestern Britain and South Wales in the late 6th century. The early poem "Y Gododdin" mentions a "Geraint before the South", conceivably a reference to Geraint mab Erbin. However, Geraint achieved his greatest fame as the hero of the prose romance "Geraint and Enid", a fictional tale that follows the narrative of Chrétien de Troyes' French work "Erec and Enide". "Geraint son of Erbin" makes heavy use of repetition in celebrating Geraint's deeds at Llongborth, which may be identified with Langport, Somerset, or Portsmouth, Hampshire though "llongborth" may refer
Geraint of Dumnonia the battle, though no settlement is known there until 880. Another interpretation is that the Battle of Llongborth is a different spelling of the Battle of Longecoleth , which is also dated to 710. The latter took place in the more northerly Kingdom of Strathclyde (also called Damnonia after the Damnonii tribe of the area in Romano-British times, and easily confused with Dumnonia/Devon). Strathclyde had rulers named Geraint and Erbin (or Elfin) in the same era. A King Geraint is the folk patron saint of Gerrans, near Falmouth, with a feast day of 10 August. It is uncertain whether this