Caitlyn is a moderately popular girls' name in United States, ranking #462 in 2014 with 692 recorded births. The name reached its all-time peak in 1998 with 2,937 births ranking #115. Since 1996, the popularity has decreased by 70.4%. In 2014, approximately 1 in every 2,581 girls born was named Caitlyn. FALLING Recent data shows the name is currently falling.