Question: title given to the eldest son of the king of france
Answer: The Dauphin of France ( UK : / ˈdoʊfæ̃ , ˈdɔː - , - fɪn / , US : / ˈdɔːfən , dɔːˈfɪn , doʊˈfæn / ; French : Dauphin de France ( dofɛ̃ də fʁɑ̃s ) ) -- strictly The Dauphin of Viennois ( Dauphin de Viennois ) -- was the dynastic title given to the heir apparent to the throne of France from 1350 to 1791 and 1824 to 1830 .