Lennyn is a distinctive boys' name in United States, ranking #11453 in 2025 with 6 recorded births. This places Lennyn in the bottom 18% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 12 births ranking #7075. In 2025, approximately 1 in every 284,679 boys born was named Lennyn. FALLING Recent data shows the name is currently falling.