Brantly is a distinctive boys' name in United States, ranking #4830 in 2007 with 19 recorded births. The name reached its all-time peak in 2013 with 103 births ranking #1540. Since 1996, the popularity has increased by 72.7%. In 2007, approximately 1 in every 109,223 boys born was named Brantly. FALLING Recent data shows the name is currently falling.