Caitlin is a highly popular girls' name in England & Wales, ranking #28 in 1998 with 1,965 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 116.9%. In 1998, approximately 1 in every 147 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.