Kaitlyn is a distinctive boys' name in United States, ranking #5743 in 2000 with 12 recorded births. The name reached its all-time peak in 2004 with 35 births ranking #2925. Since 1996, the popularity has increased by 71.4%. In 2000, approximately 1 in every 163,661 boys born was named Kaitlyn. FALLING Recent data shows the name is currently falling.