Brantly is a distinctive boys' name in United States, ranking #1540 in 2013 with 103 recorded births. The name reached its all-time peak in 2013 with 103 births ranking #1540. Since 1996, the popularity has increased by 836.4%. In 2013, approximately 1 in every 18,362 boys born was named Brantly. FALLING Recent data shows the name is currently falling.