Caitlin is a highly popular girls' name in England & Wales, ranking #35 in 2006 with 1,581 recorded births. The name reached its all-time peak in 2003 with 2,277 births ranking #22. Since 1996, the popularity has increased by 74.5%. In 2006, approximately 1 in every 189 girls born was named Caitlin. FALLING Recent data shows the name is currently falling.