Caitlin is a highly popular girls' name in England & Wales, ranking #44 in 2008 with 1,330 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 46.8%. In 2008, approximately 1 in every 237 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.