Nielsen Hayden genealogy
Family: Istvan V, King of Hungary / Erszebet of Kumania (F10354)
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Father | Male
Istvan V, King of Hungary
Born Dec 1239 Died 1 Aug 1272 Buried Married Father Béla IV, King of Hungary | F13107 Group Sheet Mother Maria Laskarina | F13107 Group Sheet
Mother | Female
Erszebet of Kumania
Born Died Aft 1290 Buried Father Kuthan, Khan of the Cumans | F8354 Group Sheet Mother
Child 1 | Female
Anna of Hungary
Born Died Abt 1284 Buried Spouse Andronicus II Palaeologus, Emperor of Byzantium | F10089 Married
Child 2 | Female
+ Maria I, Queen of Hungary
Born Abt 1257 Died 25 Mar 1323 Naples, Campania, Italy 
Buried Santa Maria Donna Regina, Naples, Campania, Italy 
Spouse Charles II, King of Naples, Sicily, and Jerusalem | F5895 Married 1270