ʿAmīd (plural ʿumadā, meaning "mainstay, support")[1] was an Arabic title used in Greater Iran under the rule of the Samanids, Buyids, Ghaznavids and Seljukids.
[1] The office of ʿāmil (governor, tax collector) was usually filled from the ranks of ʿumadā.
Persons with the name Ibn al-ʿAmīd claimed descent from members of this class of officials.
Under the Ghaznavids, the ṣāḥib al-barīd (head of the postal service) held the title ʿamīd al-mulk.
The title ʿamīd declined in the 12th century and was not used after the fall of Baghdad to the Mongols in 1258.