Kellyn is a distinctive girls' name in United States, ranking #3391 in 2003 with 43 recorded births. The name reached its all-time peak in 2008 with 67 births ranking #2731. Since 1996, the popularity has decreased by 23.2%. In 2003, approximately 1 in every 42,490 girls born was named Kellyn. FALLING Recent data shows the name is currently falling.