Katelyn is a moderately popular girls' name in England & Wales, ranking #244 in 2010 with 204 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 871.4%. In 2010, approximately 1 in every 1,574 girls born was named Katelyn. RISING Recent data shows the name is currently rising.