Daniel 5:26-30

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

Medes : the inhabitants of Media, a region south and southwest of the Caspian Sea in the Zagros mountains,a people and a nation
(34° 47´, 48° 30´)

Persian : citizen(s) of Persia
(34° 47´, 48° 30´)