And twelve kings shall reign in it, one after another: The eagle’s twelve wings represent twelve kings (see verse 16). Good News Bible provides a good model for this verse, but another possible one is:

• Twelve kings will rule this kingdom [or, territory], one after the other.

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on 1-2 Esdras. (UBS Helps for Translators). Miami: UBS, 2019. For this and other handbooks for translators see here.