Kailyn is a distinctive boys' name in United States, ranking #5758 in 2024 with 16 recorded births. This places Kailyn in the top 40% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 16 births ranking #5758. In 2024, approximately 1 in every 107,207 boys born was named Kailyn. FALLING Recent data shows the name is currently falling.