Kočapar was the knez or župan of Duklja, a Serbian state, briefly in 1102–03 under the suzerainty of Grand Prince Vukan of Rascia. He was the son of Branislav, the Prince of Duklja. Following Bodin's death in 1108, Bodin's half-brother Dobroslav II succeeded him as king of Doclea. Kočopar, Bodin's first cousin once removed, travelled from Dyrrhachium to Rascia, forging an alliance with Vukan. This alliance would prove worthy in their successful invasion of Duklja in 1102. The battle that ensued at the Morača led to the overthrow of Dobroslav II and the coronation of Kočapar to the throne. Dobroslav was subsequently banished to Rascia and a large part of Dalmatia was pillaged in the process. Vukan gave Kočapar Duklja as a fief. The two would soon brake, with Vukan, sending a squad to Doclea (city), forcing Kočapar to flee to Bosnia and then Zahumlje where he also died.
- Fine, John Van Antwerp Jr. (1991) . The Early Medieval Balkans: A Critical Survey from the Sixth to the Late Twelfth Century. Ann Arbor, Michigan: University of Michigan Press.
- Кунчер, Драгана (2009). Gesta Regum Sclavorum. 1. Београд-Никшић: Историјски институт, Манастир Острог.
- Живковић, Тибор (2009). Gesta Regum Sclavorum. 2. Београд-Никшић: Историјски институт, Манастир Острог.
- Živković, Tibor (2008). Forging unity: The South Slavs between East and West 550-1150. Belgrade: The Institute of History, Čigoja štampa.
| Prince of Duklja
under Vukan I