MASH

(mash): Named in Genesis 10:23 as one of the sons of Aramaic In the parallel passage in 1 Chronicles 1:17 the name is given as "Meshech" (meshekh), and the Septuagint (Mosoch) supports this form in both passages. "Meshech," however, is a Japhetic name (Genesis 10:2), and "Mash" would seem to be the original reading. It is probably to be identified with the Mons Masius of classical writers (Strabo, etc.), on the northern boundary of Mesopotamia.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.