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Male Henry I de Treguier Click to view Henry I de Treguier in the family tree

Henry I was born about 1100.  Henry I's father was Stephen comes Britanniae and his mother was Hawise de Guincamp.  His paternal grandfather was Eudon comes Britanniae and his paternal grandmother is Agnes de Nantes de Cornouaille. He had two brothers and four sisters, named Alan III the Black of, Geoffrey II Boterel, Agnorie Penthievre, Olive, Maud of and Theophania.  He was the third youngest of the seven children.  He died in 1183.

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