Adam Clarke on Ezra 1:8

Sheshbazzar, the prince of Judah - This was probably the Chaldean name of him who was originally called Zerubbabel: the former signifies joy in affliction; the latter, a stranger in Babylon. The latter may be designed to refer to his captive state; the former, to the prospect of release. Some think this was quite a different person, a Persian or Chaldean, sent by Cyrus to superintend whatever officers or men Cyrus might have sent to assist the Jews on their return; and to procure them help in the Chaldean provinces, through which they might be obliged to travel.