Koa
The name Koa means “hope; a congregation; a line; a rule”.
Easton's Bible Dictionary 1897
He-camel, occurs only in Ezek. 23:23, some province or place in the Babylonian empire, used in this passage along with Shoa (q.v.).
Smith's Bible Dictionary 1863
(he-camel) is a word which occurs only in (Ezekiel 23:23) It may perhaps have been a city or district of Babylonia; or it may be a common noun, signifying "prince" or "nobleman."
International Standard Bible Encyclopedia 1915
ko'-a (qoa`): A people named with Pekod and Shoa as enemies of Jerusalem (Eze 23:23). Their location was probably Northeast of Babylonia.