Katelyn is a moderately popular girls' name in England & Wales, ranking #288 in 2000 with 130 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 519.0%. In 2000, approximately 1 in every 2,101 girls born was named Katelyn. RISING Recent data shows the name is currently rising.