Brannan is a distinctive boys' name in United States, ranking #4269 in 1997 with 15 recorded births. The name reached its all-time peak in 1997 with 15 births ranking #4269. Since 1996, the popularity has increased by 15.4%. In 1997, approximately 1 in every 125,673 boys born was named Brannan. STABLE Recent data shows the name is currently stable.