Nebuchadnezzar Iii in Wikipedia
Nebuchadnezzar III (died 520 BCE) was a ruler of Bablyon.
He led a short lived rebellion against Darius I of Persia.
His exact identity is uncertain. According to the Behistun Inscription, Darius claimed that he was an impostor called Nidinta-Bel, but some historians consider that he probably did have some connection with the previous Babylonian royal family
He should not be confused with Nebuchadnezzar IV, who led a similar revolt against the Persians a few years later.