Gunnar is a distinctive boys' name in United States, ranking #539 in 2005 with 450 recorded births. The name reached its all-time peak in 2015 with 825 births ranking #388. Since 1996, the popularity has increased by 33.5%. In 2005, approximately 1 in every 4,438 boys born was named Gunnar. STABLE Recent data shows the name is currently stable.