*Istvan V King of Hungary
born about 1240 Buda, Pest, Hungary
died 1 August 1272 Buda, Pest, Hungary

father:
*Bela IV King of Hungary
born November 1206 Esztergom, Komarom-Esztergom, Hungary
died 3 May 1270

mother:
*Maria Laskarina Princess of Byzantine Empire
born about 1206 Nicaea, Bursa, Byzantium
died 1270

siblings:
Kunigunda Princess of Hungary born 1224 Buda, Pest, Hungary died 24 July 1292
Margit Princess of Hungary born about 1226 Buda, Pest, Hungary died 1242
Anna Princess of Hungary born about 1227 Buda, Pest, Hungary died 1274
Katalin Princess of Hungary born about 1229 Buda, Pest, Hungary died 1242
Erzsebet Princess of Hungary born about 1226 Buda, Pest, Hungary died 24/25 October 1271
Konstancia Princess of Hungary born about 1237 Buda, Pest, Hungary
Ilona Princess of Hungary born about 1238 Buda, Pest, Hungary died 6 March 1297/98
Margit Princess of Hungary born 1242 Buda, Pest, Hungary died 18 January 1270/71
Bela Prince of Hungary born about 1243 Buda, Pest, Hungary died 1269
Szabina Princess of Hungary born about 1245 Buda, Pest, Hungary

spouse:
*Erzsebet Princess of the Kumans
born 1240 Cumania
died after 1290

children:
Katalin Princess of Hungary born about 1257 Buda, Pest, Hungary died 1317
*Maria Princess of Hungary born about 1258 Buda, Pest, Hungary died 25 March 1323
Anna Princess of Hungary born about 1259 Buda, Pest, Hungary died 1281
Ladislas IV King of Hungary born 1259 Buda, Pest, Hungary died 10 July 1290
Erzsebet Princess of Hungary born about 1261 Buda, Pest, Hungary died 1290
Andras Prince of Hungary born 1268 Buda, Pest, Hungary died 1277
Princess of Hungary born about 1270 Buda, Pest, Hungary
Salamon Prince of Hungary born about 1272 Buda, Pest, Hungary died about 1272
Kalman Prince of Hungary born about 1274 Buda, Pest, Hungary died about 1274

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com