Katelyn is a distinctive girls' name in England & Wales, ranking #620 in 2015 with 67 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 219.0%. In 2015, approximately 1 in every 4,596 girls born was named Katelyn. RISING Recent data shows the name is currently rising.