Kaitlyn is a moderately popular girls' name in England & Wales, ranking #278 in 1999 with 132 recorded births. The name reached its all-time peak in 2006 with 400 births ranking #139. Since 1996, the popularity has increased by 238.5%. In 1999, approximately 1 in every 2,134 girls born was named Kaitlyn. STABLE Recent data shows the name is currently stable.