the first year: 426 B. C, Daniel being then eighty-seven. See App-50.
Darius. This is an appellative, and means the Maintainer or Restrainer: i.e. Cyrus. See App-57. and special note on 2 Chronicles 36:21.
Ahasuerus, an appellative. the venerable king Astyages. See App-57.
made king: i.e. Cyrus was appointed king of Babylon by Astyages his father.