Lenny is a distinctive girls' name in United States, ranking #3647 in 2021 with 42 recorded births. The name reached its all-time peak in 2025 with 61 births ranking #2799. Since 1996, the popularity has increased by 740.0%. In 2021, approximately 1 in every 39,041 girls born was named Lenny. RISING Recent data shows the name is currently rising.
Lenny is a relaxed, cheerful short form of Leonard and carries the same broader meaning family linked with lion-like bravery. It feels affectionate and retro in the best way.
Once mainly a nickname, Lenny now also works comfortably as a full given name. It fits the same modern affection for informal vintage short names as Freddie and Alfie.