Bela IV UNKNOWN
Bela IV was born in November 1206.  He died at the age of 63 on May 3rd, 1270.

 Maria Laskarina
Maria was born in 1206.  She died at the age of 64 in 1270.

 Istvan (Stephen) V UNKNOWN
Istvan (Stephen) V was born in 1240.  He died at the age of 32 on August 1st, 1272.