Kathlyn is a distinctive girls' name in United States, ranking #8628 in 2016 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 2016, approximately 1 in every 136,268 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.