Viscount Geoffrey I DE DINAN 
Geoffrey I's father was Viscount Bertrand DE DINAN. His paternal grandfather was Hamon DE DINAN. He was an only child. Geoffrey I is no longer alive.General Notes
The Pipe Roll proves William Tregoze to have been a man of greatconsequence, and to have been concerned in Norfolk, Essex, Berksand Lincolnshire.
He had a biological son named Olive I.
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