Lou is a distinctive girls' name in United States, ranking #3052 in 2021 with 54 recorded births. This places Lou in the top 17% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 70 births ranking #2541. In 2021, approximately 1 in every 30,365 girls born was named Lou. STABLE Recent data shows the name is currently stable.