Buyid dynasty
An alternate etymology proposes that the term admiral evolved, instead, from the title of Amīr al-Umarāʾ (أمير الأمراء‎). Under the reign of the Buyid dynasty (934 to 1062) of Iraq and Iran, the title of Amīr al-Umarāʾ, which means prince of princes, came to denote the heir-apparent, or crown prince.