Louis Ferdinand, dauphin de France, born in Versailles, was the eldest and only surviving son of King Louis XV of France and Queen Marie Leszczyńska, and thus heir apparent (dauphin) to the throne of France. The birth of an heir to the throne had long been awaited since the tragic decimation of the French royal family in the early 1710s (see Louis XV of France). When the third pregnancy of Marie Leszczyńska resulted in a son in 1729, … Wikipedia
The definitive Wikipedia entry for Louis, Dauphin de France. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Louis%2c_dauphin_de_France