[1][2] His origin is uncertain; Tudor Sălăgean assigned him to the kindred Aba, however, according to Pál Engel, he belonged to the Illyéd branch of the gens Kán.
[3] He had a son from his unidentified wife, Lawrence II, who served as master of the cupbearers (1272–1273; 1274) and ban of Severin (1279; 1291).
[4] Lawrence was first mentioned by contemporary records in the first regnal year (1235) of Béla IV of Hungary, when he functioned as ispán (comes) of Fejér County.
[8] He also fought in the royal army in a war against Austria in 1246 and participated in the battle of the Leitha River, where Frederick the Quarrelsome was killed.
[11] He was appointed ban of Severin (Hungarian: Szörény) in 1263, where Stephen also exercised the royal rights.