John de Byron & Joan Thies Teutonick 
They had a son named John.
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Children
John de Byron
John was born in 1255 in Cadenay, Lincolnshire, England.1 He died at the age of 84 in 1339.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=stolp&id=I1709&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I102561&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I102561&style=TABLE