He was regarded as bastard son of infidelity by his much older half-brothers, including King Béla IV of Hungary, and was not allowed to receive ducal revenues from Hungary to which he would have been entitled as son of a Hungarian king.
Старшие сводные братья, в том числе, король Венгрии Бела IV, и не давали ему согласие на получение герцогских доходов, на которые он имел бы право, как сына венгерского короля.