Lennie is a distinctive girls' name in United States, ranking #2661 in 2023 with 66 recorded births. The name reached its all-time peak in 2025 with 69 births ranking #2557. In 2023, approximately 1 in every 24,283 girls born was named Lennie. STABLE Recent data shows the name is currently stable.
Lennie is a warm vintage short form usually linked with Leonard, so it carries the same broader meaning family tied to lion-like bravery. It feels cheerful and affectionate in modern use.
The name has long existed as a nickname and sometimes stands alone as a first name. Its appeal now is very much part of the revival of soft, informal old-fashioned names.