Caitlin is a highly popular girls' name in England & Wales, ranking #26 in 2005 with 1,889 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 108.5%. In 2005, approximately 1 in every 153 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.