Robert de Plumpton & Isabella de Westwick 
They had a son named Robert.
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Children
Robert de Plumpton
Robert was born in 1268 in Plumpton, Spofforth, Yorkshire, England.2 He died at the age of 57 in 1325 in Idle, West Ride, Yorkshire, England.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=stolp&id=I9351&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=stolp&id=I3431&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=stolp&id=I3431&style=TABLE