Caitlin is a highly popular girls' name in England & Wales, ranking #22 in 2003 with 2,277 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 151.3%. In 2003, approximately 1 in every 122 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.