Kathlynn is a distinctive girls' name in United States, ranking #7026 in 1999 with 14 recorded births. The name reached its all-time peak in 2003 with 15 births ranking #7392. Since 1996, the popularity has increased by 100.0%. In 1999, approximately 1 in every 126,699 girls born was named Kathlynn. FALLING Recent data shows the name is currently falling.