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

Istvan of was born before 1233.  Istvan of's father was Andrew II of Hungary and his mother was Yolande de Courtenay.  His paternal grandfather was Bela III of Hungary and his paternal grandmother is Agnes de Chatillon; his maternal grandparents were Pierre II (Peter) de Courtenay and Yolande of Flanders. He had a sister named Yolande of. He had a half-brother named Bela IV of.

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