He was King of Cornwall, son of Cystennin Gorneau (Constantine the
Cornishman), brother of St. Digain founder of Llangernywn, Denbighshire,
father of Geraint who succeeded him. Two other sons Dywel and Erinid are
mentioned as warriors at King Arthur's court.
He has one church dedicated to him in Wales, that of Erbistock (Erbin's
Stock or Stockdale). It is situated partly in Denbighshire and partly in
Flintshire. The vale below the Church is called the Vale of Erbine. He
was possibly founder of St. Ervan's church in Cornwall.
A number of early Welsh Calendars give his feast as being January 13 or
May 29. No dates are given for his Birth or Repose. [ Lives of the
British Saints by Sabine Baring-Gould. ]