William Gilbert & Isabel Gambon 
They had a son named Otho.
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Children
Otho Gilbert
Otho was born on March 24th, 1416 in Compton, Devon, England.2 He died at the age of 77 on February 4th, 1494 in Compton, Devon, England.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=:3017071&id=I585459993
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=forester_grebel&id=P4195438620&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=forester_grebel&id=P4195438620&style=TABLE