Brannan is a distinctive boys' name in United States, ranking #9702 in 2006 with 7 recorded births. This places Brannan in the bottom 31% 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 46.2%. In 2006, approximately 1 in every 293,588 boys born was named Brannan. STABLE Recent data shows the name is currently stable.