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Male William De Plumpton Click to view William De Plumpton in the family tree

William De was born in 1294 in Plumpton, Cumbria, Yorkshire, Eng.  William De's father was Robert De Plumpton and his mother was Lucy De Ros Roos.  His paternal grandparents were Robert de Plumpton , Sir and Isabella de Westwick; his maternal grandparents were William II de Ros , of Ingmanthorpe, Sir and Eustache FitzHugh. He had a brother and a sister, named Robert De and Eustacia De.  He was the oldest of the three children.  He died at the age of 68 in 1362 in Plumpton, Cumbria, Yorkshire, Eng.


William De's family with Christian Mowbray

‌William De and Christian were married in a religious ceremony about 1332 in Plumpton, Spofforth, Yorkshire, England.  They had a son and a daughter, named Robert De and Alice De.

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