Robert Fitz Hugh de Tattershall & Isabel de Gaunt 
They had a son named Philip.
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Personal Details
Robert Fitz Hugh de Tattershall
Robert was born in 1100 in Castle Tattershall, Lincolnshire, England.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I027180&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I098831&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I098831&style=TABLE