Iowerth ab Owain Arglwydd Caerllion & Angharad ferch Uchtryd 
They had three sons and four daughters, named Hywel, Owain, Dynfnwal, Nest, Gwladus, Angharad and Amabl.
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Children
Birth Notes
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=clcaldwell&id=I085508&style=TABLE
Hywel ab Iorwerth Arglwydd Caerllion
Hywel was born in 1150 in Caerleon, Gwent, Cymru.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=aet-t&id=I50877&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=aet-t&id=I50636
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=aet-t&id=I50636