Kaylyn is a distinctive girls' name in United States, ranking #642 in 2007 with 462 recorded births. The name reached its all-time peak in 1997 with 462 births ranking #519. Since 1996, the popularity has increased by 10.3%. In 2007, approximately 1 in every 4,161 girls born was named Kaylyn. STABLE Recent data shows the name is currently stable.