Katlynn is a distinctive girls' name in United States, ranking #9900 in 2020 with 10 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 95.4%. In 2020, approximately 1 in every 161,551 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.