Guigues IV Dauphin
count of Viennois
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Guigues IV Dauphin was a ruler of Viennois in southeastern France during the 12th century. He was the first to bear the name "Dauphin," which became a distinctive title for the rulers of this region. His successors continued to use this name, and their domain eventually became known as Dauphiné. This title was later adopted by the French monarchy for their heir apparent, beginning in the 14th century when the future Charles V of France purchased the lands of Dauphiné.12
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