Katielynn is a distinctive girls' name in United States, ranking #6942 in 2008 with 19 recorded births. The name reached its all-time peak in 2006 with 20 births ranking #6478. Since 1996, the popularity has increased by 137.5%. In 2008, approximately 1 in every 99,511 girls born was named Katielynn. STABLE Recent data shows the name is currently stable.