Katilyn is a distinctive girls' name in United States, ranking #1986 in 2001 with 86 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has increased by 28.4%. In 2001, approximately 1 in every 20,937 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.