Katilyn is a distinctive girls' name in United States, ranking #1929 in 2000 with 88 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has increased by 31.3%. In 2000, approximately 1 in every 20,636 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.