Sylvestre De La Guerche 
Sylvestre was born in 1010. Sylvestre's father was Mainguené De La Guerche. He was an only child. He died at the age of 65 in 1075.General Notes
#Générale# Seigneur de La Guerche et Pouancé
Veuf, il devient Evêque de Rennes en 1075.
He had a biological son named Geoffroy.
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