The Chronicon Albeldense records that “Bermisindam, Pelagii filiam” married “Adefonsus…Petri, Cantabriæ ducis filius” who succeeded King Fáfila. The Chronicle of Alfonso III names "the daughter of Pelayo Ermesinda" when recording her marriage to "Alfonso the son of Peter". Her birth date range is estimated from the birth of her first known child in [740]. Her marriage date is deduced from the Chronicle of Alfonso III recording that Alfonso "enjoyed many victories alongside his father-in-law".
The Sebastiani Chronicon records that "Adefonsus…cum uxore sua Regina Ermesinda" was buried "in territorio Cangas in Monasterio S. Mariæ". 1
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