Kellyn is a distinctive girls' name in United States, ranking #2998 in 2000 with 47 recorded births. This places Kellyn in the top 17% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 67 births ranking #2731. Since 1996, the popularity has decreased by 16.1%. In 2000, approximately 1 in every 38,638 girls born was named Kellyn. FALLING Recent data shows the name is currently falling.