Simon Kacsics, Count of the Székelys

On 10 November 1308, Simon was one of the signatories of the treaty of Kékes, when papal legate Gentile Portino da Montefiore persuaded Matthew Csák to accept Charles's rule.

[6] However Simon turned on his feudal lord by the following months and joined Charles' partisans, just before the siege of Komárom (today Komárno, Slovakia), when the royal army had captured the fort on 3 November 1317.

[7] Simon recognized good sense of pace that the king would sooner or later will overcome the oligarchs, thus he was able to preserve his influence and landholdings successfully, supporting his cousin Thomas Szécsényi's growing power.

Soon, they were jointly sent to the Kingdom of Bohemia as representants of Charles, in addition to an interpreter Stephen Sáfár, in order to find a bride for the king (whose wife Maria of Bytom had died in December 1317).

[8] Despite his oath of loyalty to Charles, John III, Bishop of Nyitra, who had been earlier impaired and expelled by Matthew Csák's violent actions, excommunicated the oligarch's five former familiares, including Simon, on 3 March 1318.

[9] The prelate recalled that after the seizure of Nyitra Castle and destroying several episcopal villages, Simon loudly abused and intended to stab John with a sword in the presence of Matthew Csák, but the powerful oligarch prevented him by his admonition.

[15] About three months later, Szécsényi (possibly with the assistance of Simon) seized Csicsó (present-day Ciceu-Corabia in Romania), the last fortress of the Kán kindred.

[12] On 20 April 1322, Voivode Thomas Szécsényi, Count Simon Kacsics and Bishop Andrew Szécsi jointly convened a general assembly to Keresztes (today a borough in Turda, Romania), demonstrating the province's successful consolidation.

[17] However, soon, Simon's career turned into downfall: as a royal diploma from 9 October 1338 narrates, he was dismissed (in 1327 or 1328) from his dignity, because he had committed "serious crimes" and his confiscated land of Róna was granted by Szécsényi.