Cailin is a distinctive girls' name in United States, ranking #1288 in 2000 with 150 recorded births. The name reached its all-time peak in 2003 with 164 births ranking #1274. Since 1996, the popularity has increased by 22.0%. In 2000, approximately 1 in every 12,106 girls born was named Cailin. FALLING Recent data shows the name is currently falling.