Nielsen Hayden genealogy
Family: Béla IV, King of Hungary / Maria Laskarina (F13107)
m. Abt 1218-
Father | Male
Béla IV, King of Hungary
Born 1206 Died 3 May 1270 Buried Married Abt 1218 [1] Father András II, King of Hungary | F13109 Group Sheet Mother Gertrud von Meran | F13109 Group Sheet
Mother | Female
Maria Laskarina
Born Abt 1206 of Nicea, Anatolia 
Died 1270 Buried Father Theodoros I Komnenos Laskaris, Emperor in Nicea | F8862 Group Sheet Mother Anna Komnena Angelina | F8862 Group Sheet
Child 1 | Female
+ Constance of Hungary
Born Died Buried Spouse Leo Danilowitsch, King of Halicz | F17342 Married Between 1251 and 1252
Child 2 | Female
+ Anna of Hungary
Born Abt 1226 Died Buried Spouse Rosztiszlo, King of Bulgaria; Grand Duke of Kiev | F14992 Married 1244
Child 3 | Male
+ Istvan V, King of Hungary
Born Dec 1239 Died 1 Aug 1272 Buried Spouse Erszebet of Kumania | F10354 Married
Child 4 | Female
+ Helene of Hungary
Born Abt 1244 Esztergom, Hungary Died 6 Mar 1298 Gniezno, Poland Buried Spouse Boleslaw | F14973 Married 1257
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Sources - [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.
- [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.