Kaetlyn is a distinctive girls' name in United States, ranking #8484 in 2010 with 14 recorded births. The name reached its all-time peak in 1997 with 57 births ranking #2343. Since 1996, the popularity has decreased by 54.8%. In 2010, approximately 1 in every 126,952 girls born was named Kaetlyn. FALLING Recent data shows the name is currently falling.