Katilyn is a distinctive girls' name in United States, ranking #1840 in 1999 with 87 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has increased by 29.9%. In 1999, approximately 1 in every 20,388 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.