According to Professor William Shea from Andrews University a Babylonian inscription may record the actual names of Daniel’s three friends, Hananiah, Mishael and Azariah. Daniel 1:6-7 states the following:
DA 1:6 Now among them from the sons of Judah were Daniel, Hananiah, Mishael and Azariah.
DA 1:7 Then the commander of the officials assigned new names to them; and to Daniel he assigned the name Belteshazzar, to Hananiah Shadrach, to Mishael Meshach and to Azariah Abednego. Daniel 1:6-7 (NASB)
The Istanbul Prism of Nebuchadnezzar is a clay prism found in Babylon, housed in the Istanbul museum, which gives a list of men and their titles. Three men listed on the prism have pronunciations, which are very similar to the names of Daniel’s three friends. Whether or not they are the actual men mentioned in the bible is uncertain.
Found on the list is the name Arbenebo, Official of the Royal Prince. This name is the equivalent to the Aramaic name Abednego and may in fact be the first mention of one of Daniel’s friends found outside of the Bible.
Another name found on the list is Hannunu, Commander of the king’s merchants. The name Hannunu may be the Babylonian equivalent for the Hebrew name Hananiah.
Another name found on the list is Meshaku, Official to Nebuchadnezzar. Meshaku is very similar in pronunciation to Meshach.
Each of these men held an administrative position in Babylon just as Daniel 2:49 states.
Bible Believer’s Archaeology Volume 1, σελ. 102.