Kathlyn is a distinctive girls' name in United States, ranking #6032 in 2008 with 23 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 46.5%. In 2008, approximately 1 in every 82,205 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.