Caitlyn is a moderately popular girls' name in England & Wales, ranking #192 in 2010 with 264 recorded births. The name reached its all-time peak in 2005 with 353 births ranking #144. Since 1996, the popularity has increased by 676.5%. In 2010, approximately 1 in every 1,216 girls born was named Caitlyn. STABLE Recent data shows the name is currently stable.