In 2018, 51 is the most common age for an American (U.S.) Nat* who is registered male with the Social Security Administration. It is the 9, 088th most common male first name for living U.S. citizens. *as a first name, not a nickname.
― Anonymous User 10/16/2018
3
Due to vowels pitch contrast in Nathaniel and Natalie "Nat" appears to shorten Natalie while retaining its brightness or strength. I was given the name Nathaniel and nickname Nat in late 70's at a time when Nathan appears the more prominent masculine choice. I treat them as Formal and Informal. I've yet to meet another using Nat, 2 Natalie's and 3 Nathaniel's.
Nat King Cole is a famous bearer. Nat was also the owner of The Peach Pit on the TV show Beverly Hills 90210.
― Anonymous User 12/16/2005
3
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.