Len is a distinctive boys' name in United States, ranking #10174 in 2020 with 7 recorded births. The name reached its all-time peak in 2014 with 15 births ranking #5890. Since 1996, the popularity has decreased by 46.2%. In 2020, approximately 1 in every 246,438 boys born was named Len. FALLING Recent data shows the name is currently falling.