Brannan is a distinctive boys' name in United States, ranking #7755 in 2009 with 10 recorded births. This places Brannan in the bottom 47% 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 23.1%. In 2009, approximately 1 in every 198,331 boys born was named Brannan. STABLE Recent data shows the name is currently stable.