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Humbert II of Viennois was the last Dauphin of Viennois, a title that he held from 1349 until 1355. He was also Count of Albon and Dauphiné from 1333 until his death. In 1349, he became the first Dauphin of Viennois to also be Duke of Viennois. In 1355, he sold Dauphiné to Philip VI of France.