Kathlyn is a distinctive girls' name in United States, ranking #3849 in 2002 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 2002, approximately 1 in every 52,848 girls born was named Kathlyn. RISING Recent data shows the name is currently rising.