CUB

kub (kubh; the King James Version Chub): The word occurs only in Ezekiel 30:5. There it is almost certainly a corruption, and we should read, as in Septuagint, "Lub," i.e. Libya. Libya, in the earlier part of the same verse (the King James Version), is a mistr of "Put," thus correctly rendered in the Revised Version (British and American).

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