Father: Alexander de PERCY , of Ormsby & Sneaton, Sir b: BEF JUL 1281 in Ormesby, Yorkshire North Riding, England
Mother: Juliana b: ABT 1283
Marriage 1 John de MOWBRAY , of Kirklington, Judge b: ABT 1310 in Kirklington with Upsland, Yorkshire North Riding, England
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