Katelyn is a moderately popular girls' name in England & Wales, ranking #220 in 2003 with 211 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 904.8%. In 2003, approximately 1 in every 1,321 girls born was named Katelyn. RISING Recent data shows the name is currently rising.