Kathlyn is a distinctive girls' name in United States, ranking #14433 in 2022 with 6 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 86.0%. In 2022, approximately 1 in every 273,127 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.