Ralph du Plessis 
Ralph du was born in 1177 in Poitou, Aquitaine, France. Ralph du is no longer alive.
He had a biological son named John de.
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Children
John de Plessis , 8th Earl of Warwick
John de was born about 1207 in Poitou, Aquitaine, France. He died in Hook Norton, Banbury, Oxfordshire, England.
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