Atabeg

Atabeg, Atabek, or Atabey is a hereditary title of nobility of Turkic origin, indicating a governor of a nation or province who was subordinate to a monarch and charged with raising the crown prince. The first instance of the title's use was with early Seljuk Turks who bestowed it on the Persian vizier Nizam al-Mulk. It was later used in the Kingdom of Georgia, first within the Armeno-Georgian family of Mkhargrdzeli as a military title and then within the house of Jaqeli as princes of Samtskhe.