Katlynn is a distinctive girls' name in United States, ranking #2543 in 2009 with 74 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 65.7%. In 2009, approximately 1 in every 24,823 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.