Kaitlyn is a highly popular girls' name in United States, ranking #30 in 2000 with 8,759 recorded births. The name reached its all-time peak in 2000 with 8,759 births ranking #30. Since 1996, the popularity has increased by 21.0%. In 2000, approximately 1 in every 207 girls born was named Kaitlyn. FALLING Recent data shows the name is currently falling.