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Male William De La Plaunche Click to view William De La Plaunche in the family tree

William's father was William De Fiennes and his mother was Agnes De Dammartin.  His paternal grandparents were Enguerrand I De Fiennes and Sibyl De Boulogne; his maternal grandparents were Alberic (Aubrey) II Of Dammartin and Matilda (Maud Mahaut) Of Ponthieu. He had two brothers and three sisters, named Enguerrand II De, Baldwin De, Miss De, Maud De and Michel De.


William's family

He had a biological son named William.

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