Nielsen Hayden genealogy
Descendants of Peredur Goch
Peredur Goch
   └─ Cadwaladr ap Peredur Goch
   
       └─ Letis ferch Cadwaladr ap Peredur Goch
        Rhiwallon ap Dyngad ap Tudor Trevor (Abt 965 - ??)
           │ +
            + Ednyfed Gam ap Llywarch Gam ap Lluddocca ao Tudur Trefor (Abt 995 - ??)