1824, in reference to the northern branch of the Semitic language group, from Greek Aramaia, the biblical land of 'Aram, roughly corresponding to modern Syria. The place name probably is related to Hebrew and Aramaic rum "to be high," thus originally "highland." As a noun, "the Aramaic langue," from 1833; Aramaic was the lingua franca of the Assyrian empire, the official language of the Persian kingdom, and the daily language of the Jews at the time of Christ.
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Harper, D. (n.d.). Etymology of Aramaean. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Aramaean