Hermesenda was the daughter of Gonzalo Trastámirez de Amaya but her mother is unknown. The date and place of her birth have not been found.
Her husband was Nuño González de Lara. They were married, but the date and place have not been found. Their two known children were Gonzalo II Núñez (?-1103) and Alvar Núñez (?-?).
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