Nielsen Hayden genealogy
Family: Fernando IV, King of Castile / Costanza of Portugal (F13169)
m. Jan 1302Sancho IV, King of Castile and León (1258-1295) 
|
Maria de Molina (1262-1321)
|
Beatriz of Castile (1293-1359)  |
| Diniz, King of Portugal (1261-1325)
|
| St. Isabel of Portugal (1271-1336)
|
| Afonso IV, King of Portugal (1291-1357) |
| Fernando IV, King of Castile (1285-1312)
|
| Costanza of Portugal (1290-1313)
|
| Alfonso XI, King of Castile and Leon (1311-1350) |