Brannan is a distinctive boys' name in United States, ranking #7768 in 2008 with 10 recorded births. The name reached its all-time peak in 1997 with 15 births ranking #4269. Since 1996, the popularity has decreased by 23.1%. In 2008, approximately 1 in every 203,995 boys born was named Brannan. STABLE Recent data shows the name is currently stable.