Research Notes:

The Gestis Hungarorum Liber records the marriage of "dux Arpad…filius suus Zulta" and "Menumorout…filiam suam", and that his father-in-law gave Zoltán "Byhor castrum" and, dying without sons, bequeathed all his estates to his son-in-law. ¹

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Ménmarót was the ruler of the lands between the rivers Mureș, Someș and Tisza at the time of the Hungarian conquest of the Carpathian Basin around 900, according to the Gesta Hungarorum.... Menumorut's duchy was populated primarily with Khazars and Székelys....

According to the Gesta, the Magyars eventually besieged and seized Menumorut's fortress at Biharia, and forced him to give his daughter in marriage to Zoltán, the son of Árpád.... The chronicle states that Menumorut died around 906 and was succeeded by his son-in-law. ²