Kelin first appears in the U.S. registration record in 1968. Its popularity climbed over the following decades. In 2006, 30 babies received the name (ranked #3483). Today it sits well outside the top 1,000 (around #10418), with roughly 8 babies named Kelin each year. Kelin's usage has held roughly steady recently. In total, around 799 babies have been registered with this name since 1880.