Genesis 38:5 places Judah at Chezib when his wife gave birth to Shelah, the youngest of their three sons. Shelah later became the ancestor of an important Judahite family.
Joshua 15:44 lists Achzib among towns within Judah's inheritance, while 1 Chronicles 4:21-22 associates Cozeba with descendants of Shelah. These references support the connection between the differently rendered forms of the place name.
Micah 1:14 includes Achzib in a prophetic series of wordplays involving towns of Judah. The prophet uses the name in connection with deception or disappointment while announcing judgment upon the region.