Katilyn is a distinctive girls' name in United States, ranking #2953 in 2006 with 58 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has decreased by 13.4%. In 2006, approximately 1 in every 32,777 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.