Katilynn is a distinctive girls' name in United States, ranking #8738 in 2008 with 14 recorded births. The name reached its all-time peak in 1999 with 28 births ranking #4144. Since 1996, the popularity has decreased by 39.1%. In 2008, approximately 1 in every 135,051 girls born was named Katilynn. STABLE Recent data shows the name is currently stable.