Allan (Algernon) de PERCY & Emma (Gant) de GAUNT 
They had a son named William de.
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Personal Details
Allan (Algernon) de PERCY
Allan (Algernon) de was born after 1067 in Alnwick, Northumberland, England. He died after 1130.
Emma (Gant) de GAUNT
Emma (Gant) de was born about 1076 in Folkingham, Lincolnshire, England. She died after 1150.
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Children
William de PERCY
William de was born about 1112 in Alnwick,Northumberland, England. He died about 1175.