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Cadwgon ap Elystan & Efa verch Gwrgan

They had a son named Iowerth.

Personal Details
- Cadwgon ap Elystan
  Cadwgon was born in 0975 in Radnorshire, Wales.¹
  
  Efa verch Gwrgan
  Efa was born in Glamorganshire, Wales.¹

Children
- Iowerth ap Cadwgon
  Iowerth was born about 1020 in Buillth, Breconshire, Wales.¹

¹ http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=tjglad&id=I67936&style=TABLE