William IV Plantagenet WARREN & Maud (Matilda) MARSHALL 
They had a son named John de (Plantagenet).
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Personal Details
William IV Plantagenet WARREN
William IV Plantagenet was born in 1166 in Surrey, England. He died at the age of 74 on May 27th, 1240 in Surrey, England.
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Children
John de (Plantagenet) WARREN
John de (Plantagenet) was born in 1220 in Warren, Sussex, England. He died at the age of 85 on September 27th, 1305 in Kennington, Surrey, England.