Katlynn is a distinctive girls' name in United States, ranking #5932 in 2015 with 22 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 89.8%. In 2015, approximately 1 in every 81,121 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.