A tablet unearthed in 1920 was recently translated by Michael Jursa, associate professor at the University of Vienna, who was on a routine research trip to the British Museum.
The above mentioned tablet reads as follows: "[Regarding] 1.5 minas (0.75 kg) of gold, the property of Nabu-sharrussu-ukin, the chief eunuch, which he sent via Arad-Banitu the eunuch to [the temple] Esangila: Arad-Banitu has delivered [it] to Esangila. In the presence of Bel-usat, son of Alpaya, the royal bodyguard, [and of] Nadin, son of Marduk-zer-ibni. Month XI, day 18, year 10 [of] Nebuchadnezzar, king of Babylon."
According to Jeremiah 39, Nebo-Sarsekim was present in 587BC when Nebuchadnezzar “marched against Jerusalem with his whole army and laid siege to it”.
This is considered to be a rare discover because it is rare to find a non-biblical source of a real person who is not a king.
Okay, one more man down. We know now that he is real!
http://www.timesonline.co.uk/tol/comment/faith/article2056362.ece