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Male Mahaut De Fiennes Click to view Mahaut De Fiennes in the family tree

Mahaut was born in 1205.  Mahaut's father was William I De Fiennes and his mother is Agnes en Goelle De Dammartin.  His paternal grandfather was Enguerrand De Fiennes and his paternal grandmother is Sybilla Bologne De Tyngrie; his maternal grandparents were Alberic II De Dammartin and Matilda De Clermont. He had two brothers and a sister, named Ingelram, William De la Plaunche and Michel.  He is the second oldest of the four children.

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