Katelyn is a moderately popular girls' name in England & Wales, ranking #390 in 2012 with 120 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 471.4%. In 2012, approximately 1 in every 2,684 girls born was named Katelyn. RISING Recent data shows the name is currently rising.