Kathlyn is a distinctive girls' name in United States, ranking #8363 in 2018 with 13 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 69.8%. In 2018, approximately 1 in every 130,802 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.