Katelyn is a moderately popular girls' name in England & Wales, ranking #439 in 1998 with 68 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 223.8%. In 1998, approximately 1 in every 4,253 girls born was named Katelyn. RISING Recent data shows the name is currently rising.