Katlynn is a distinctive girls' name in United States, ranking #3142 in 2010 with 53 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 75.5%. In 2010, approximately 1 in every 33,534 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.