Desa (monarch) in the context of "Helena of Serbia, Queen of Hungary"

Uroš II (Serbian Cyrillic: Урош II) was Serbian Grand Prince from c.1145 to 1162, with brief interruptions as ruler by Desa, his brother. His rule was characterized by a period of power struggle, not only of the Serbian throne between the brothers but between the Byzantine Empire and Kingdom of Hungary, of which he took advantage. He had two brothers Desa and Beloš, and a sister Helena of Serbia, Queen of Hungary. Furthermore, Uroš II also had to contend with the Second Norman invasion of the Balkans (1147-1149).

Some researchers have proposed that several events (1162), narrated by John Kinnamos in reference to the grand prince Primislav (Serbian Cyrillic: Примислав), who is also known as Prvoslav (Serbian Cyrillic: Првослав), should be attributed to Uroš II, but those assumptions are not accepted by other scholars who hold that Primislav/Primislav was brother or cousin Uroš II.