Django Reinhardt - Nuages - Paris, 13.12.1940
According to Alan Furst in Midnight In Europe, this is the tune being played in Le Cygne, a fictional Paris nightclub in February of 1938.
This makes the third time I've heard the name Django, and the second time today. The first time was the movie with the guy who played Ray Charles (that would be Jamie Foxx). The second time was in an email I got today from some people working on a software project using that name. So when I came across it again tonight, I just had to look him up.