Katlynn is a distinctive girls' name in United States, ranking #3879 in 2012 with 40 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 81.5%. In 2012, approximately 1 in every 44,019 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.