Tamar (Georgian: თამარი) was a daughter of the Western Georgian King Alexander I of Imereti, and the Queen consort of Georgia, as the second wife of Alexander I of Georgia.
Her father was Alexander I of Imereti, King of Western Georgia who reigned de facto from 1387 until his death in 1389.
In 1442, Alexander abdicated his kingdom which he left to the eldest son he had from his first wife, Dulandoukht, daughter of Beshken Orbelian, Vakhtang IV.
Alexander therefore retired to a monastery under the name of Athanasius and died in 1446, thus leaving Tamar at the mercy of his stepson.
However, she survived her two stepsons Vakhtang and Demetrius, and it was during the reign of her own son, George VIII, in 1455, that she died.