Vukac Hrvatinić was a Duke

Duke

A duke or duchess is a member of the nobility, historically of highest rank below the monarch, and historically controlling a duchy...

 in the service of Ban

Ban (title)

Ban was a title used in several states in central and south-eastern Europe between the 7th century and the 20th century.-Etymology:The word ban has entered the English language probably as a borrowing from South Slavic ban, meaning "lord, master; ruler". The Slavic word is probably borrowed from...

 Tvrtko Kotromanić of Bosnia

Bosnia (region)

Bosnia is a eponomous region of Bosnia and Herzegovina. It lies mainly in the Dinaric Alps, ranging to the southern borders of the Pannonian plain, with the rivers Sava and Drina marking its northern and eastern borders. The other eponomous region, the southern, other half of the country is...

. He was a member of the Croat House of Hrvatinić

House of Hrvatinic

Hrvatinić dynasty was a medieval Bosnian/Croatian noble house which ruled over various parts of Bosnia, Croatia and Dalmatia between the 13th century and the 15th century....

.

In 1363 Bosnia was invaded by the Hungarian King. The city of Soko

Soko

Sokoband, formerly known as Soko, is a jazz fusion duo, featuring pianist Michael Sokolowski and bassist Houston Ross. The group formed as a trio in Charlottesville, Virginia in 1991, with Sokolowski, Ross, and drummer John Gilmore. The group performed live for several years, then released their...

 on Pliva

Pliva

Pliva d.d. is a Croatian pharmaceutical company, based in Zagreb, Croatia. One of the world's largest producers of generic Adderall, it has seen drastic increases in revenue with an increasing number of patients being diagnosed with Attention Deficit Disorder . It is the largest pharmaceutical...

 was defended by Vukac during the King's siege on 8-10 July. Vukac defended it so efficiently that the King practically became too bored to besiege it any further and retreated to Hungary

Hungary

Hungary , officially the Republic of Hungary , is a landlocked country in Central Europe. It is situated in the Carpathian Basin and is bordered by Slovakia to the north, Ukraine and Romania to the east, Serbia and Croatia to the south, Slovenia to the southwest and Austria to the west. The...

.

Vukac had three sons:

• Hrvoje
  Hrvoje Vukcic
  Hrvoje Vukčić Hrvatinić was a Ban of Croatia, Grand Duke of Bosnia and a Herzog of Split. He was the most prominent member of the Croatian noble House of Hrvatinić and the strongest of the three main large feudalists of early feudal medieval Bosnia...
  
  ,
• Vuk,
• Vojislav.