Briende 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 Lambert de Thury. They were married, but the date and place have not been found. They had no known children.
Her second husband was Guy de Montfort-Castres. They were married, but the date and place have not been found. Their three known children were Alicie (?-?), Agnès (?-?) and Guy II (?-1254).