Kathlyn is a distinctive girls' name in United States, ranking #3501 in 2003 with 41 recorded births. This places Kathlyn in the top 19% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 63 births ranking #2725. In 2003, approximately 1 in every 44,562 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.