Brantly is a distinctive boys' name in United States, ranking #5915 in 2005 with 13 recorded births. The name reached its all-time peak in 2013 with 103 births ranking #1540. Since 1996, the popularity has increased by 18.2%. In 2005, approximately 1 in every 153,627 boys born was named Brantly. FALLING Recent data shows the name is currently falling.