The eponymous founder was čelnik Musa, who married Dragana Hrebeljanović, the sister of Tsar Lazar (r. 1371-1389).

Stefan and Lazar Musić, the sons of Musa, held a region of roughly modern Raška municipality and north Kosovo.

They relocated their seat to Brvenik on the Ibar, due to the swapping of fortified cities with Vojislav Vojinović (around 1355-1363).

[1] They supported the politics of Prince Lazar Hrebeljanović (r. 1371–89), and participated in the war against veliki župan Nikola Altomanović (1366–73), whom Stefan Musić directly ordered to be blinded in Užice, and thus left the political war during the fall of the Empire.

The two Musić brothers fell in the Battle of Kosovo (1389), and were buried in Nova Pavlica.