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Male William (Sir) IV de WASHINGTON Click to view William (Sir) IV de WASHINGTON in the family tree

William (Sir) IV de was born about 1310 in Durham, or North lancashire, England.  William (Sir) IV de's father was Walter (Sir) III de WASHINGTON and his mother was Dionysia UNKNOWN.  His paternal grandparents were William (Sir) III de WASHINGTON and Margaret de MORVILLE.  He was an only child.  He died in 1367.


William (Sir) IV de's family with Katherine UNKNOWN

They had a son named William (Sir) V.