Nielsen Hayden genealogy
Cadwgon ap Madog ap Cadwgon ap Bleddyn
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- 1 Cadwgon ap Madog ap Cadwgon ap Bleddyn [1]
Gwenllian ferch Owain Gwynedd
- 2 Madog ap Cadwgon ap Madog ap Cadwgon [1.1]
b. Abt 1170
Efa ferch Madog ap Philip ab Uchtrud
- 3 Nest ferch Madog [1.1.1]
Einion ap Seisyll b. Abt 1170
- 4 Margred ferch Einion ap Seisyll [1.1.1.1]
[ =>]
- 4 Margred ferch Einion ap Seisyll [1.1.1.1]
- 3 Nest ferch Madog [1.1.1]
- 2 Madog ap Cadwgon ap Madog ap Cadwgon [1.1]