Katlynn is a distinctive girls' name in United States, ranking #5070 in 2013 with 27 recorded births. The name reached its all-time peak in 1999 with 268 births ranking #813. Since 1996, the popularity has decreased by 87.5%. In 2013, approximately 1 in every 64,978 girls born was named Katlynn. FALLING Recent data shows the name is currently falling.