[7] Historian Florin Curta writes that the Gesta Hungarorum presented Gyula's family based on a local legend which "seems to have been blown out of proportions and linked to an earlier confusion between a family name and the name of a military rank [gyula] in the Magyar federation of tribes".
[8][13] The Byzantine historian, John Skylitzes mentioned a "chieftain of the Turks",[14] or Hungarians, named Gylas, who was baptised in Constantinople around 952.
[1] The Romanian historian Vlad Georgescu argues that Gyula (Gyla) seems to have been of Pecheneg origin, since Byzantine sources speak of the existence of a Petcheneg tribe called Gylas; a life of the monarch-saint Stephen I also mentions battles with Pechenegs in the heart of Transylvania.
[16] The Chronicon Pictum ("Illuminated Chronicle") narrates that[1] Stephen inflicted a devastating defeat upon Koppány whose corpse was quartered.
[16] The Romanian historian Florin Curta suggests that the only contemporary source to mention Stephen's attack against “rex Geula” is the Annales Hildesheimenses.
[18] Florin Curta argues that Procui cannot possibly be the same as Gyula: according to the 13th century Gesta Ungarorum, Gyula was captured by King Stephen I and kept in prison for the rest of his life; by contrast, Procui was expelled from his estates, given back his wife, and later appointed warden of a frontier fort by King Boleslav I of Poland.
I have never heard of anyone who showed such restraint towards a defeated foe.Zumbor begat the younger Geula, father of Bua and Bucna, during whose time the holy King Stephen subjugated to himself the land of Transylvania and led Geula in fetters to Hungary and held him imprisoned for all the days of his life because he was false in faith and refused to be a Christian and did many things against the holy King Stephen, even though he was of the line of his mother.