Kellyn is a distinctive girls' name in United States, ranking #3294 in 2012 with 50 recorded births. The name reached its all-time peak in 2008 with 67 births ranking #2731. Since 1996, the popularity has decreased by 10.7%. In 2012, approximately 1 in every 35,215 girls born was named Kellyn. FALLING Recent data shows the name is currently falling.