Louis, Grand Dauphin

Louis of France, Dauphin of France (1 November 1661 14 April 1711) was the eldest son and heir of Louis XIV, King of France and his wife, Marie Therese of Austria. He was called the "Grand Dauphin" (which is "Le Grand Dauphin" in French) because his great-grandson who was the son of Louis XV and the father of Louis XVI, Louis, Dauphin of France (1729-1765).
He had two wives. The first one was Maria Anna Victoria of Bavaria, they both got married in 1680 and had 3 children together. The second was Marie Émilie de Joly from their marriage in 1695 until Louis's death in 1711. They had no children together.
He never became king as he died before his father did therefore, the heir became his eldest child who is Louis, Duke of Burgundy. However, the Duke of Burgundy died a year later so the heir became the Duke of Burgundy's son, Louis XV.
Issue.
Thus, through Burgundy and Anjou, Louis ensured the continuation of the senior Bourbon line on the throne of France and the establishment of the cadet Spanish Bourbon dynasty respectively.