Daniel 8:1-18

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

Elam : son of Shem son of Noah,a country east of the Tigris and Babylon in the territory of Media,son of Shashak of Benjamin,son of Meshelemiah; a Levite gatekeeper,a man whose descendants returned from exile in Babylon; Elam I,forefather of exile returnees with Zerubbabel; Elam II,forefather of returnees headed by Jeshaiah,forefather of Shecaniah who had to put away his heathen wife,an Israelite chief who signed the covenant to obey God's law,a priest who helped Nehemiah dedicate the new wall of Jerusalem
(32° 11´, 48° 15´)

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

Susa : capital city of Elam and winter home of the Persian kings (OS)
(32° 11´, 48° 15´)

Ulai : a river flowing through Susa, Persia into the Euphrates delta
(32° 10´, 48° 13´)