Nielsen Hayden genealogy
Ancestors of (Unknown daughter of Thomas ap Rhodri)
┌── Owain Gwynedd, King of Gwynedd ( - 1169 bur.Bangor Cathedral, Bangor, Gwynedd, Wales) =>
┌── Rhodri ab Owain Gwynned ( - 1195)
│ └── Cristin ferch Gronwy ab Owain ab Edwin (of Tegeingl, Wales - ??) =>
│
┌── Thomas ap Rhodri ab Owain Gwynned (Abt 1170 - ??)
│
│ ┌── Seisyll (Abt 1130 of Meirionnydd, Wales - ??)
│ ┌── Einion ap Seisyll (Abt 1170 - ??)
│ │ └── Isabel ferch Bradwen
│ │
│
│ ┌── Madog ap Cadwgon ap Madog ap Cadwgon (Abt 1170 of Nannau, Meirionnydd, Wales - ??) =>
└── Nest ferch Madog