Nielsen Hayden genealogy
Family: Istvan V, King of Hungary / Erszebet of Kumania (F10354)
Béla IV, King of Hungary (1206-1270) 
|
Maria Laskarina (1206-1270)
|
Anna of Hungary (1226- )  |
| Helene of Hungary (1244-1298) |
| Kuthan, Khan of the Cumans ( -1241) |
| Istvan V, King of Hungary (1239-1272)
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| Erszebet of Kumania ( -1291)
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| Anna of Hungary ( -1284) |
| Maria I, Queen of Hungary (1257-1323) |