Caitlyn is a distinctive girls' name in England & Wales, ranking #526 in 2017 with 82 recorded births. This places Caitlyn in the top 7% of ranked UK girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2005 with 353 births ranking #144. Since 1996, the popularity has increased by 141.2%. In 2017, approximately 1 in every 3,647 girls born was named Caitlyn. STABLE Recent data shows the name is currently stable.