Kathlyn is a distinctive girls' name in United States, ranking #4744 in 2009 with 31 recorded births. The name reached its all-time peak in 2024 with 63 births ranking #2725. Since 1996, the popularity has decreased by 27.9%. In 2009, approximately 1 in every 59,254 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.