My guess is that we have Audrey Hepburn to thank for the popularity of Tiffany as a baby name

Source:  Social Security Administration



Breakfast at Tiffany's opened on October 5, 1961.

MOVIE REVIEW.  The Screen: 'Breakfast at Tiffany's':Audrey Hepburn Stars in Music Hall Comedy.  (The New York Times, 10/6/1961)

Above all, it has the overpowering attribute known as Audrey Hepburn, who, despite her normal, startled fawn exterior, now is displaying a fey, comic talent that should enchant Mr. Capote, who created the amoral pixie she portrays, as well as moviegoers meeting her for the first time in the guise of Holly Golightly.

Related post:
The meteoric rise and fall of Tammy.  (12/18/2013)