John of Monmouth & partner 
They had a daughter named Margaret.
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Children
Joan (Margaret) of Monmouth
Joan, known as Margaret, was born in 1201.2 She died at the age of 46 in November 1247.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=michaelrneuman&id=I047880&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I80019&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I80019&style=TABLE