John de Cromwell & Helen de Leybourne 
They had a son named Robert.
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Personal Details
John de Cromwell
John was born in 1336 in Cromwell Bottom Hall, Southowram, Halifax, West Riding, Yorkshire, England.1
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Children
Robert de Cromwell
Robert was born in 1360 in Cromwell Bottom Hall, Southowram, Halifax, West Riding, Yorkshire, England.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I141373&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I141361&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I141361&style=TABLE