Katilyn is a distinctive girls' name in United States, ranking #1646 in 1997 with 96 recorded births. The name reached its all-time peak in 1998 with 101 births ranking #1614. Since 1996, the popularity has increased by 43.3%. In 1997, approximately 1 in every 18,132 girls born was named Katilyn. STABLE Recent data shows the name is currently stable.