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Male Viscount Guethenoc de Chateautro-en-Porhoet Click to view Viscount Guethenoc de Chateautro-en-Porhoet in the family tree

Guethenoc was born in Guilliers, Morbihan, France.  Guethenoc's father is Judicaël de Rennes.  His paternal grandparents were Duke Conan ("the Crooked") de Bretagne I and Ermengarde de Anjou. He had a sister named Rantlina.  He died in 1040.


Guethenoc's family with Alarun de Cornouaille

‌Guethenoc and Alarun were married in a religious ceremony about 1008.  They had a son named Josselin.

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