Louise was the daughter of Gui d'Urgel de Saint-Priest and Philiberte de Mello. The date and place of her birth have not been found.
She had two marriages/partners. Her first husband was Randon II de Joyeuse. They were married, but the date and place have not been found. They had no known children.
Her second husband was Théode de Valpergue. They were married, but the date and place have not been found. They had no known children.