William I of was born in 1130. William I of's father was Amadeus I of Geneva and his mother was Matilda. His paternal grandparents were Aimon I of Geneva and Ida of Glane. He was an only child. He died at the age of 48 on June 16th, 1178.
General Notes
Count of Geneva. Marriage to Beatrix de Faucigny thought to be doubtful.