Gyula (Yula, Gula, Gila) was, according to Muslim and Byzantine sources, the title of one of the leaders, the second in rank, of the Hungarian tribal federation in the 9th–10th centuries.[1] In the earliest Hungarian sources, the title name is only recorded as a personal name (Gyyla, Geula, Gyla, Iula).[1]
According to the Hungarian chronicles, Transylvania was ruled by a line of princes called Gyula, and their country was occupied by King Stephen I of Hungary (1000/1001–1038).[1]