Henry I de PERCY & Isabel de BRUS 
They had a son named William de.
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Personal Details
Henry I de PERCY
Henry I de was born in 1169 in Alnwick, Northumberland, England. He died after 1200.
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Children
William de PERCY
William de was born about 1198 in Alnwick, Northumberland, England. He died about July 28th, 1215 in Yorkshire, England.