Brown Driver Briggs

 Belteshazzar = "lord of the straitened's treasure"
1. the 4th of the greater prophets, taken as hostage in the first
deportation to Babylon; because of the gift of God of the
interpretation of dreams, he became the 2nd in command of the
Babylon empire and lasted through the end of the Babylonian empire
and into the Persian empire. His prophecies are the key to the
understanding of end time events. Noted for his purity and holiness
by contemporary prophet, Ezekiel
  1) also, 'Daniel' (H1840 or H1841)