Katlynn is a distinctive girls' name in United States, ranking #813 in 1999 with 268 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has increased by 24.1%. In 1999, approximately 1 in every 6,619 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.