Katilyn is a distinctive girls' name in United States, ranking #2974 in 2007 with 60 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has decreased by 10.4%. In 2007, approximately 1 in every 32,041 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.