Cailynn is a distinctive girls' name in United States, ranking #4655 in 1998 with 23 recorded births. The name reached its all-time peak in 2009 with 68 births ranking #2679. Since 1996, the popularity has increased by 53.3%. In 1998, approximately 1 in every 76,821 girls born was named Cailynn. FALLING Recent data shows the name is currently falling.