[1][2] His life is only known from the information given in the Chronicle of the Priest of Duklja, according to which he is sometimes called Dobroslav II in modern historiography.
Dobroslav was the eldest of four sons of the Dioclean king Michael I and his second wife, a Greek.
According to the Chronicle of Duklja, Dobroslav was selected by the people to become king after the death of Bodin.
However, his reign was short as Vukan, Grand Prince of Serbia, along with the pretender to the Dioclean throne, Kočopar, attacked Duklja, defeating Dobroslav at the Battle of Morača.
However, upon his arrival, Vladimir imprisoned him in Scutari where he was blinded and castrated on the orders of Bodin's widow, Queen Jaquinta.