Kathlyn is a distinctive girls' name in United States, ranking #4419 in 2007 with 34 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 20.9%. In 2007, approximately 1 in every 56,543 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.