Katlynn is a distinctive girls' name in United States, ranking #1391 in 2003 with 143 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 33.8%. In 2003, approximately 1 in every 12,777 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.