Katilyn is a distinctive girls' name in United States, ranking #5214 in 2013 with 26 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has decreased by 61.2%. In 2013, approximately 1 in every 67,477 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.