raised up - in purpose: not fulfilled till a hundred fifty years afterwards.
north - In Isa 41:2, “from the East”; both are true: see the note there.
call ... my name - acknowledge Me as God, and attribute his success to Me; this he did in the proclamation (Ezr 1:2). This does not necessarily imply that Cyrus renounced idolatry, but hearing of Isaiah’s prophecy given a hundred fifty years before, so fully realized in his own acts, he recognized God as the true God, but retained his idol (so Naaman, 2Ki 5:1-27; compare 2Ki 17:33, 2Ki 17:41; Dan 3:28; Dan 4:1-3, Dan 4:34-37).
princes - the Babylonian satraps or governors of provinces.
mortar - “mire”; He shall tread them under foot as dirt (Isa 10:6).