Louis of France ( 16 August 1682 -- 18 February 1712 ) was the eldest son of Louis , Dauphin of France , known as le Grand Dauphin and , as such , was known as le Petit Dauphin . Louis de France , Son of France , Duke of Burgundy ( duc de Bourgogne ) , and later Dauphin of France ( 16 August 1682 -- 18 February 1712 ) was the eldest son of Louis , Dauphin of France , known as le Grand Dauphin and , as such , was known as le Petit Dauphin .