Caitlyn is a moderately popular girls' name in England & Wales, ranking #261 in 2013 with 183 recorded births. This places Caitlyn in the top 3% of ranked UK girls' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2005 with 353 births ranking #144. Since 1996, the popularity has increased by 438.2%. In 2013, approximately 1 in every 1,686 girls born was named Caitlyn. STABLE Recent data shows the name is currently stable.