The Duke of Slavonia ( Croatian: slavonski herceg; Latin: dux Slavoniae), also Duke of Dalmatia and Croatia ( Croatian: herceg Hrvatske i Dalmacije; Latin: dux Dalmatiae et Croatiae) [1] and sometimes Duke of "Whole Slavonia", Dalmatia and Croatia ( Croatian: herceg cijele Slavonije, Hrvatske i Dalmacije; Latin: dux totius Sclavoniae, Croatiae et Dalmatiae) [2] was a title of nobility granted several times in the 13th and 14th centuries, mainly to relatives of Hungarian monarchs or other noblemen. [3] The title of duke signified a more extensive power than that of the Ban of Slavonia or Ban of Croatia. [4]