Lennyn is a distinctive boys' name in United States, ranking #10289 in 2014 with 7 recorded births. This places Lennyn in the bottom 27% 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 2014, approximately 1 in every 274,348 boys born was named Lennyn. FALLING Recent data shows the name is currently falling.