Daniel 8:1

Belshazzar : the deputy king of Babylon after Nebuchadnezzar

Daniel : the prophet who wrote the book of Daniel,son of David and Abigail,head of clan (Ithamar Levi) who pledged to obey God's law,prophet who wrote the book of Daniel

Daniel 8:15

Daniel : the prophet who wrote the book of Daniel,son of David and Abigail,head of clan (Ithamar Levi) who pledged to obey God's law,prophet who wrote the book of Daniel

Daniel 9:20-21

Gabriel : a specific angel,an angel who brought understanding to the prophet Daniel

Israel : a citizen of Israel.,a member of the nation of Israel

Daniel 12:5

Daniel : the prophet who wrote the book of Daniel,son of David and Abigail,head of clan (Ithamar Levi) who pledged to obey God's law,prophet who wrote the book of Daniel