Dux
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In Roman law. A leader or mllitary commander. The commander of an army.
Dig. 3, 2, 2, pr.
In feudal and old European law. Duke; a title of honor, or order of nobility.
1 Bl. Comm. 307; Crabb, Eng. Law, 236.
In later law. A military governor of a province.
See Cod. 1, 27, 2.
A military officer having charge of the borders or frontiers of the empire, called "dux limitis."
Cod. 1, 49, 1, pr.
At this period, tEe word began to be used as a title of honor or dignity.