Brannan is a distinctive boys' name in United States, ranking #6994 in 2001 with 9 recorded births. This places Brannan in the bottom 43% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 15 births ranking #4269. Since 1996, the popularity has decreased by 30.8%. In 2001, approximately 1 in every 215,870 boys born was named Brannan. STABLE Recent data shows the name is currently stable.