[1] Both Izsép and John participated in the Battle of Mohi on 11 April 1241, where the Mongol invaders measured heavy defeat on the Hungarian royal army.
[2] John inherited his father's possessions in Somogy County, including Bő – the eponymous estate – with its clan monastery, half of Magyari (today Buzsák) and a portion of Gyugy with accessories, which laid south to Somogyvár.
Historian Jenő Szűcs argued John was one of the four noble judges (Hungarian: szolgabíró) in Somogy County since the early 1260s, and functioned in this capacity in the aforementioned lawsuits.
[5] Following King Béla and his son Duke Stephen together confirmed the liberties of the "royal servants", from then on known as noblemen in their Decree of 1267, the ispán (head) of Somogy County, Lawrence, son of Kemény was commissioned to review the ownership of several possessions in the county, as one of the articles of the Decree of 1267 ordained that "the lands of the nobles, which thou art ours, the peoples of the queen's free villages, or the courtiers, or the castle folks, are occupied or kept occupied under any pretext, must be returned to these nobles".
For his loyal service, John was granted the other half of Magyari (prior to that, it belonged to the castle folks of Somogyvár) by Béla IV in the same year.
[4] Joining the royalist army, John participated in the Battle of Föveny in late September 1274, where Henry Kőszegi was killed and Ladislaus' brother Andrew was liberated.
The subsequent court at Segesd on 25 March, chaired by Denis' successor Peter Csák ruled in the favor of John based on an evidentiary procedure.