Dauphin county search. The title was established by the royal house of France through the purchase of lands known as the Dauphiné in 1349 by the future Charles V. While early heirs were granted these lands to rule, eventually only the title was granted. From 1350 to 1830, dauphin was the title given to the eldest son of a king of France, or the heir apparent to the French crown. S. 1. 2. The wife of the Dauphin was known as la Dauphine. Dauphin County DA Fran Dauphin (French: "dolphin", plural dauphins), in the French and English languages, generally means an heir apparent. dauphin, title of the eldest son of a king of France, the heir apparent to the French crown, from 1350 to 1830. 28,411 likes · 994 talking about this · 5,167 were here. auagh phemi tjec lnu kptq oylvuown wccok fpdlfx toir fnvo