Katelyn is a moderately popular girls' name in England & Wales, ranking #439 in 2014 with 100 recorded births. The name reached its all-time peak in 2004 with 263 births ranking #185. Since 1996, the popularity has increased by 376.2%. In 2014, approximately 1 in every 3,067 girls born was named Katelyn. RISING Recent data shows the name is currently rising.