From the Social Security Administration:

"If you remember last year’s baby name craze around the 'Twilight' novels and movies, it should come as no surprise that 'Twilight' scores again this year. The second fastest riser on the boys’ list is Kellan, the name of actor Kellan Lutz, best known for playing Emmett Cullen in the 'Twilight' series."

http://www.ssa.gov/pressoffice/pr/baby-names2010-pr.html