Gustav is a distinctive boys' name in United States, ranking #4938 in 2014 with 19 recorded births. The name reached its all-time peak in 2019 with 45 births ranking #2776. Since 1996, the popularity has decreased by 32.1%. In 2014, approximately 1 in every 101,076 boys born was named Gustav. STABLE Recent data shows the name is currently stable.