Possibly he was born into a wealthy magnate family, as he was mentioned with the honorary title of "magister", demonstrating his university degree (presumably in abroad).
[3] He held the latter function, when Andrew II commissioned him and Mojs, former ispán of Vas County, to investigate the rightful ownership of Szentgotthárd Abbey over the land Dobra (or Vasdobra; today Neuhaus am Klausenbach, Austria) in 1213, which was confirmed by the king after certainty.
Upon the request of Thomas and other bishops, Andrew donated 500 silver denari to the crusaders from the salt income of Szalacs (today Sălacea, Romania) at Easter.
[9] Peter was killed in a skirmish against the Ayyubid Sultanate, while Thomas, who was present at the Siege of Damietta, left the region in September 1219 and arrived home in the first half of 1220.
[8] Following that Honorius commissioned Thomas and two abbots in January 1222 to investigate the case of the provost of Arad, who was allegedly unlawfully deprived of his property by Andrew II.
[10] When the king persuaded his son Béla to separate from his wife, Maria Laskarina, Honorius asked his three loyal prelates, including Thomas to inform him about the situation in May 1222.
[8] Pope Honorius instructed Thomas in January 1223 to appoint a suitable archdeacon or deacon over the clerics of Burzenland, who is introduced to him by the Teutonic Knights.
The region earlier was granted to the Teutonic Knights, who donated Borza (today Bârza, Romania) to the Holy See, which act was neglected by Andrew and Raynald of Belleville, Bishop of Transylvania.