Baron of Mitford Robert Bertram IV 
He had a biological son named Robert V.
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Personal Details
Baron of Mitford Robert Bertram IV
Robert was born on April 23rd, 1287 in Bothal Demesne, Morpeth, Northumberland, England.1 He died at the age of 27 on October 7th, 1314 in Mitford, Northumberland, England.2
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Children
Robert V Bertram
Robert V was born on March 31st, 1307 in Bothal Demesne, Morpeth, Northumberland, England. He died at the age of 56 on November 20th, 1363.
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=schluck&id=I9437
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=schluck&id=I9436
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=schluck&id=I9436