Gustav is a distinctive boys' name in United States, ranking #3686 in 2025 with 30 recorded births. This places Gustav in the top 26% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2019 with 45 births ranking #2776. In 2025, approximately 1 in every 56,936 boys born was named Gustav. STABLE Recent data shows the name is currently stable.