Geoffrey* I Vicomte De Chateaudun 
Geoffrey* I Vicomte's father was Warcine* De Alencon and his mother was Melesinde* De Dunois. His paternal grandparents were William* I Talvas Sire De Alencon and Matilda* De Ganelon; his maternal grandparents were Geoffrey* II De Dunois and UNKNOWN ??. He was an only child. He died in 1038.1 
They had a son named Hugh* I Vicomte.
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