Katilyn is a distinctive girls' name in United States, ranking #3233 in 2005 with 48 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has decreased by 28.4%. In 2005, approximately 1 in every 38,494 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.