House of Kosača

Kosača Косача Kosačić Косачић
Country	Vassal to Serbian Kingdom/Empire (ca. 1331–1355) Vassal to Kingdom of Bosnia (1388–1415) Vassal to  Ottoman Empire (1415–1444, 1469–1480) Vassal to Kingdom of Aragon (1444–1466)
Estates	Gornje Podrinje or Gornja Drina (area around the upper course of the Drina river) Hum (1388–1480) (roughly modern Herzegovina) Duchy of Saint Sava (1435–1480)
Titles	Grand Duke of Bosnia (Veliki Vojvoda Bosanski) Herzog (Duke) of Hum and the Coast Herzog of Saint Sava
Founded	first half of the 14th century
Founder	Vuk Kosača
Final ruler	Vlatko Hercegović
Dissolution	1483

The Kosača (Serbo-Croatian in Cyrillic: Косача, pl. Kosače / Косаче) was a Bosnian medieval noble family which ruled over parts of modern Bosnia and Herzegovina, Dalmatia (in southern Croatia), Old Herzegovina (in western Montenegro) and Raška (in southwestern Serbia), between the 14th century and the 15th century. The land they controlled was known as Hum (Zahumlje), roughly corresponding to modern region of Herzegovina, which itself was derived from the title "Herzog", which Stjepan Vukčić Kosača adopted in 1448. The family ruled as vassals to several states, including the Kingdom of Bosnia and Ottoman Empire. The Kosača family members belonged to the Bosnian Church, Catholic Church and Serbian Orthodox Church.

The family name Kosača was probably taken after the village of Kosače near Goražde, in the Upper Drina region of eastern Bosnia, where the Kosača family were originally estate owners.

The founder, Vuk (by which the family is also called Vuković (Serbo-Croatian in Cyrillic: Вуковић, pl. Vukovići / Вуковићи)), was a prominent military commander under Emperor Dušan the Mighty of Serbia (r. 1331–1355) who took part in the conquests of southern Balkans. He was given lands around Upper Drina.

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