Emir

"They say he is an Emir of Andulus and the General of Tyrinian Army. I asked Lord Gladius, what is Emir? He said, you fool, an 'Emir' is a man that holds high-ranking prowess in the Court of Andulus and its Military Leadership, an Andal Aristocrat."
~ The Nobles of Greensburg, Tyrinia, Stãggös and Ulrich, discussing Siyad-al-Din Tutush.
The Emir is a rank of nobility given to a male monarch, aristocrat, holder of high-ranking military or a political office, or other person possessing actual or ceremonial authority.
In various regions, the title is used as a formal monarchical title, as a synonymous with "prince", applicable both to a son of a hereditary monarch, and to a reigning monarch of a sovereign principality, namely an princely emirate like the Emirate of the Saka Empire, the Ghiyas-ud-Din Emirate, with its leader, the Second Prince of the Saka Empire, Emir Saka Ghiyas-ud-Din Bin Saka Kaykaus.
In other terminology, it is used the term "Emir" is used to denote a "Commander", a "General", or a "Leader" like the Emir of Yjdan, the Emir of Tatar, or the Emir of the Akbari Emirate.