Nicknames:
Nate.
Famous people named Natan:
There are no famous Natans, though famous Nathans abound.
Fun fact:
This is the Russian, Polish, Ukrainian, Serbian, Swedish, and Finnish version of Nathan.
The root Hebrew name that gave rise to the name Nathan, meaning "he gave." And let's hope for your sake, that can be lengthened to mean, "He gave a lot of effort to be a straight-A student." Or at least get his homework done most of the time.