Katilyn is a distinctive girls' name in United States, ranking #15010 in 2017 with 6 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has decreased by 91.0%. In 2017, approximately 1 in every 287,646 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.