Brantly is a distinctive boys' name in United States, ranking #4937 in 2002 with 15 recorded births. The name reached its all-time peak in 2013 with 103 births ranking #1540. Since 1996, the popularity has increased by 36.4%. In 2002, approximately 1 in every 129,431 boys born was named Brantly. FALLING Recent data shows the name is currently falling.