Katilyn is a distinctive girls' name in United States, ranking #16868 in 2018 with 5 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has decreased by 92.5%. In 2018, approximately 1 in every 340,085 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.