Kaetlyn is a distinctive girls' name in United States, ranking #3400 in 1999 with 37 recorded births. The name reached its all-time peak in 1997 with 57 births ranking #2343. Since 1996, the popularity has increased by 19.4%. In 1999, approximately 1 in every 47,940 girls born was named Kaetlyn. FALLING Recent data shows the name is currently falling.