Brannan is a distinctive boys' name in United States, ranking #9900 in 2007 with 7 recorded births. The name reached its all-time peak in 1997 with 15 births ranking #4269. Since 1996, the popularity has decreased by 46.2%. In 2007, approximately 1 in every 296,462 boys born was named Brannan. STABLE Recent data shows the name is currently stable.