Fausset's Bible Dictionary
One of the cities in the land of Shinar, with Babel, Erech, and Calneh, the beginning of Nimrod's kingdom (Genesis 10:10). Jerome (Onomasticon) testifies that the Jews then believed Nisibis was Accad, a city on the river Khabour, in the N.E. of Mesopotamia, midway between Orfa and Nineveh. So the Targum of Jerusalem. Nisibis' ancient name was Acar, which the Syriac Peschito version has here. Akkad was the name of the "great primitive Hamite race who inhabited Babylonia from the earliest time, and who originated the arts and sciences. In the inscriptions of Sargon the name is applied to the Armenian mountains instead of the vernacular Ararat" (Rawlinson, Herodotus, 1:319, note). The form Kinzi Akkad is found in the inscriptions. Agadi was the great city of the earlier Sargon (G. Smith). Bechart fixes on a site nearer the other three cities in the ancient Sittacene: Akker-koof, or Akker-i-Nimrond, a curious pile of ancient buildings. The Babylonian Talmud mentions the site under the name Aggada. A tract N. of Babylon was called Aceere (Knobel).
These files are public domain.
Fausset, Andrew R. Entry for 'Accad'. Fausset's Bible Dictionary. https://www.studylight.org/dictionaries/eng/fbd/a/accad.html. 1949.