is brit short for britney?

It's short for ' Larry '.

I believe that It's a Scandinavian Name ... Same as ROD STEWART's "Ex".

Britney is such an illiterate trailer-trash spelling of the name. Britanny is much more classy and happens to be Ms. Marling's name. Similarly, Beyonce is the low-class ghetto spelling, Biancé is exotic, sexy, and classy.

Are you sure she's actually a Brittany?
Because I read an interview where she said that it's really just "brit" and it came from her norwegian grandmother...

According to IMDB and Wikipedia, Brittany is her name. Damn this woman is gorgeous.

http://www.imdb.com/name/nm1779870/
http://en.wikipedia.org/wiki/Brit_Marling

Brittany Heyworth "Brit" Marling is her full name, and she's stated in many interviews that she was named "Brit" after her Norwegian great-granmother.

Anatidaephobia — the fear that somewhere, somehow, a duck is watching you.