Kellyn is a distinctive girls' name in United States, ranking #4035 in 2002 with 32 recorded births. The name reached its all-time peak in 2008 with 67 births ranking #2731. Since 1996, the popularity has decreased by 42.9%. In 2002, approximately 1 in every 56,151 girls born was named Kellyn. FALLING Recent data shows the name is currently falling.