What is "koppany"

Koppány, also known as Cupan, was the Duke of Somogy in Hungary in the late 10th century. According to modern scholars' consensual view, he was a member of the royal Árpád dynasty. Koppány was the lord of the southern region of Transdanubia during the reign of Géza, Grand Prince of the Hungarians, who ruled between the early 970s and 997. After the death of Géza, Koppány laid claim to the throne against Géza's devout Christian son, Stephen. His claim was mainly supported by pagan Hungarians, but the royal army routed his army near Veszprém in 997 or 998. Koppány was killed either in the battle or in his duchy, to which he had fled from the battlefield. His corpse was cut in four pieces to be displayed on the walls of four major strongholds of Hungary, Győr, Veszprém, Esztergom and Gyulafehérvár (now Alba Iulia, Romania).