princes of the north - Syria, which is still called by the Arabs the north; or the Tyrians, north of Palestine, conquered by Nebuchadnezzar (Ezekiel 26:1-28:26), [Grotius].
Zidonians - who shared the fate of Tyre (Eze 28:21).
with their terror they are ashamed of their might - that is, notwithstanding the terror which they inspired in their contemporaries. “Might” is connected by Maurer thus, “Notwithstanding the terror which resulted from their might.”