Kathlyn is a distinctive girls' name in United States, ranking #10680 in 2020 with 9 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 79.1%. In 2020, approximately 1 in every 179,501 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.