Eleanor of Joinville

Eleanor of Joinville was the daughter of William of Joinville, seigneur of Gex, and Joan of Savoy. On the death of her brother Hugh, the last of the Joinville-Gex line, she inherited the barony of Gex. In 1351 she married Hugh of Geneva, who held Gex through her and refused homage to Count Amadeus VI of Savoy.

Savoyard troops seized Gex in 1354, and the treaty of Paris in 1355 assigned the Pays de Gex to Savoy. Her marriage was childless.