Humbert I of Viennois
Humbert I of Viennois was baron of la Tour-du-Pin and then also became, by his marriage, dauphin of Viennois. He was the son of Albert IV, baron of la Tour-du-Pin, and of Béatrice de Coligny.
In 1294, Humbert became a vassal of King Philip IV of France in exchange for £500 annual pension, which would give impetus to the acquisition of the Dauphiné, by King Philip VI of France, fifty years later.
In 1273 he married Anne of Burgundy - their nine children were:
- John II, succeeded his father as dauphin of Viennois
- Hugues, baron de Faucigny
- Guigues, seigneur de Montauban.
- Alix, married John I, count of Forez in 1296
- Marie, married Aymar de Poitiers-Valentinois
- Marguerite, married Frederick I, marquis de Salucce in 1303
- Béatrice, married Hugh I of Chalon-Arlay in 1312
- Henri, bishop of Metz
- Catherine, married Philip of Savoy, count of Piedmont and prince of Achaea in 1312
