Kaylyn is a distinctive girls' name in United States, ranking #2525 in 2025 with 70 recorded births. The name reached its all-time peak in 1997 with 462 births ranking #519. Since 1996, the popularity has decreased by 83.3%. In 2025, approximately 1 in every 22,961 girls born was named Kaylyn. STABLE Recent data shows the name is currently stable.