Katlyn is a distinctive girls' name in United States, ranking #1256 in 2009 with 195 recorded births. The name reached its all-time peak in 1997 with 1,232 births ranking #242. Since 1996, the popularity has decreased by 83.6%. In 2009, approximately 1 in every 9,420 girls born was named Katlyn. FALLING Recent data shows the name is currently falling.