 According to the "B" version of the eleventh- to thirteenth-century "Annales Cambriæ", Owain was slain in 1015.This obituary is corroborated by the thirteenth- and fourteenth-century texts "Brut y Tywysogyon" and "Brenhinedd y Saesson".Although the notices of Owain's demise seem to indicate that he was killed in battle, nothing is known of the circumstances.