A "Geraint of the South" appears at the
Battle of Catraeth (circa 600) in the poem
Y Gododdin, attributed to
Aneirin. This is conceivably a reference to Geraint mab Erbin, son of the 5th-century king
Erbin of Dumnonia. Geraint is also mentioned as one of the "Three Seafarers of the Isle of Britain" in the
Welsh Triads. Geraint's deeds at the Battle of Llongborth are celebrated in the poem "
Geraint son of Erbin", which was written probably in the 10th or 11th century and traditionally attributed to
Llywarch Hen. However, Derek Bryce, following other scholars, suggests that the later, historical
Geraint of Dumnonia (d. 710) may be identified as the real warrior eulogised in connection with the Battle of Llongborth in the poem, despite its title. Bryce identifies Llongborth with the 710 battle between that Geraint and Saxon leader
Ine of Wessex.
Strathclyde had rulers named Geraint and Erbin/Elfin in the same era, and was also known as Damnonia, after the
Dumnonii tribe of the area in
Romano-British times, and thus easily confused with
Dumnonia/
Devon. The
Anglo-Saxon Chronicle says: "Port and his two sons, Bieda and Maegla, came to Britain at the place called
Portsmouth, and slew a young Welshman, a very noble man." Scholars believe that the Llongborth mentioned in the poem "Geraint son of Erbin" is the Portsmouth of the
Chronicle entry and that Geraint is the "young Welshman" who was killed there. ==Arthurian legend==