Katlynn is a distinctive girls' name in United States, ranking #3290 in 2011 with 50 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 76.9%. In 2011, approximately 1 in every 35,176 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.