Ralph de Byron & partner 
They had a son named Hugh.
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Children
Sir Hugh de Byron
Hugh was born about 1099 in Horstan Castle, Horsley, Derbyshire, England.2 He died before 1155.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=dadslegacy&id=I7285&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=dadslegacy&id=I7274
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=dadslegacy&id=I7274