Kaithlyn is a distinctive girls' name in United States, ranking #12286 in 2016 with 8 recorded births. The name reached its all-time peak in 2002 with 21 births ranking #5568. Since 1996, the popularity has increased by 60.0%. In 2016, approximately 1 in every 221,436 girls born was named Kaithlyn. FALLING Recent data shows the name is currently falling.