Koa
Easton's Dictionary
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 Dictionary
(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.”