Katelyn is a moderately popular girls' name in England & Wales, ranking #200 in 2005 with 241 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 1,047.6%. In 2005, approximately 1 in every 1,196 girls born was named Katelyn. RISING Recent data shows the name is currently rising.