Kaitlyn is a moderately popular girls' name in England & Wales, ranking #345 in 2015 with 137 recorded births. The name reached its all-time peak in 2006 with 400 births ranking #139. Since 1996, the popularity has increased by 251.3%. In 2015, approximately 1 in every 2,248 girls born was named Kaitlyn. STABLE Recent data shows the name is currently stable.