Asshur

second son of Shem (Gen 10:22; 1Chr 1:17). He went from the land of Shinar and built Nineveh, etc. (Gen 10:11; 10:12). He probably gave his name to Assyria, which is the usual translation of the word, although the form Asshur is sometimes retained (Num 24:22; 24:24; Ezek 27:23), etc. In (Gen 2:14) "Assyria" ought to be "Asshur," which was the original capital of Assyria, a city represented by the mounds of Kalah Sherghat, on the west bank of the Tigris. This city was founded by Bel-kap-kapu about B.C. 1700. At a later date the capital was shifted to Ninua, or Nineveh, now Koyunjik, on the eastern bank of the river. (See CALAH; NINEVEH)

EBD - Easton's Bible Dictionary