Kathlyn is a distinctive girls' name in United States, ranking #9411 in 2019 with 11 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 74.4%. In 2019, approximately 1 in every 152,507 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.