Katlyn is a distinctive girls' name in United States, ranking #1743 in 2011 with 118 recorded births. The name reached its all-time peak in 1997 with 1,232 births ranking #242. Since 1996, the popularity has decreased by 90.1%. In 2011, approximately 1 in every 14,905 girls born was named Katlyn. FALLING Recent data shows the name is currently falling.