Kaylyn is a distinctive girls' name in United States, ranking #723 in 2008 with 411 recorded births. This places Kaylyn in the top 4% of ranked US girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 1997 with 462 births ranking #519. In 2008, approximately 1 in every 4,600 girls born was named Kaylyn. STABLE Recent data shows the name is currently stable.