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Male Istvan of Hungary Duke of Slavonia Click to view Istvan of Hungary Duke of Slavonia in the family tree

Istvan of Hungary was born in 1235.  Istvan of Hungary's father was Andras II of Hungary King of Hungary and his mother was Yolande de Courtenay. He had a sister named Yolande (Violante\Jolan). He had a half-brother named BEla IV of Hungary.  He died at the age of 37 in 1272.

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