Kellyn is a distinctive girls' name in United States, ranking #3518 in 2001 with 38 recorded births. This places Kellyn in the top 20% 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 32.1%. In 2001, approximately 1 in every 47,383 girls born was named Kellyn. FALLING Recent data shows the name is currently falling.