Elvira was the daughter of unknown parents. The date and place of her birth have not been found.
She had two marriages/partners. Her first husband was Ermengol VIII d'Urgel. They were married, but the date and place have not been found. Their only known child was Aurembiaix (1196-1231).
Her second husband was Guillén de Cervera. They were married, but the date and place have not been found. They had no known children.