Kellyn is a distinctive girls' name in United States, ranking #3700 in 2006 with 42 recorded births. The name reached its all-time peak in 2008 with 67 births ranking #2731. Since 1996, the popularity has decreased by 25.0%. In 2006, approximately 1 in every 45,264 girls born was named Kellyn. FALLING Recent data shows the name is currently falling.