Walter (Sir) III de WASHINGTON & Dionysia UNKNOWN 
They had a son named William (Sir) IV de.
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Personal Details
Walter (Sir) III de WASHINGTON
Walter (Sir) III de was born before 1270 in Washington, Durham, England. He died after 1315.
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Children
William (Sir) IV de WASHINGTON
William (Sir) IV de was born about 1310 in Durham, or North lancashire, England. He died in 1367.