Katlynn is a distinctive girls' name in United States, ranking #802 in 1998 with 265 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has increased by 22.7%. In 1998, approximately 1 in every 6,668 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.