Question: What is the date of birth of Louis, Dauphin Of France (Son Of Louis Xv)'s mother?
Sentence (from "Louis, Dauphin of France (son of Louis XV)"): Louis, Dauphin of France (4 September 1729 – 20 December 1765) was the elder and only surviving son of King Louis XV of France and his wife, Queen Marie Leszczyńska.
Relevant evidence: Yes