Cailin is a distinctive girls' name in United States, ranking #2316 in 2012 with 81 recorded births. The name reached its all-time peak in 2003 with 164 births ranking #1274. Since 1996, the popularity has decreased by 34.1%. In 2012, approximately 1 in every 21,738 girls born was named Cailin. FALLING Recent data shows the name is currently falling.