Could also be a nickname for Natan, or any of the feminine forms of these names.
― Anonymous User 11/4/2008
2
Nat can also be short for Natasha, which is my name. [noted -ed]
― Anonymous User 7/3/2008
5
Generally used as a short version of Natalie in more recent times. I haven't met a Nathan born after 1975 that wasn't a Nate or a Naith but every Natalie I meet (including me) gets called Nat.