Brannan is a distinctive boys' name in United States, ranking #12408 in 2021 with 5 recorded births. The name reached its all-time peak in 1997 with 15 births ranking #4269. Since 1996, the popularity has decreased by 61.5%. In 2021, approximately 1 in every 349,647 boys born was named Brannan. STABLE Recent data shows the name is currently stable.