Jakó's parentage is unknown, thus he is the first member of the kindred's so-called Nagymihály branch,[1] which possessed landholdings in Szatmár County.
Historian Péter Németh considered that this castle never existed, and the fort was merely a fabrication compiled by members of the Meggyesi family during a late 14th-century lawsuit, as an identification with their fortified manor in Meggyes.
Through this marriage, Jakó's branch acquired several landholdings in Ung and Zemplén counties, since Peter, Catherine's father had no male descendants.
In the next year, Agnes donated these estates to their daughters and grandsons, establishing the Nagymihály lordship, an important fortune of the Kaplon clan.
[6] Through Andrew, Jakó (I) was ancestor of the Nagymihályi kinship, for instance the Sztáray (Sztárai), Tibai, Ödönfi, Pongrácz, Ördög and Lucskai noble families.