A doubly Presidential name, via Pierce and Roosevelt, Franklin was given an initial boost via the fame of Benjamin Franklin. It also has a literary tie to the main character of the Wilkie Collins classic The Moonstone.
Franklin was a Top 100 name at the peak of the FDR period. It now ranks at Number 443. But will Franklin get a boost from the pro-Fran-name feeling evidenced since the ascension of Pope Francis? It's been up the past three years, so time will tell.