William I of Geneva (c. 1132 – 25 July 1195) was Count of Geneva from 1178 to 1195. He was the son of Amadeus I, Count of Geneva and Matilda de Cuiseaux.[1]
William married Agnes of Savoy.[1] They had:
- Humbert[1]
Following his first wife's death c. 1172,[2] William married Marguerite Beatrice de Faucigny,[1] they had:
- Marguerite of Geneva, wife of Thomas I of Savoy[1]
- William II of Geneva
William's third marriage, to Beatrice de Vaupergue, his last wife, was childless. He died at the Château de Novel in Annecy, France.