Brennen is a distinctive boys' name in United States, ranking #1391 in 2016 with 126 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 50.4%. In 2016, approximately 1 in every 15,057 boys born was named Brennen. FALLING Recent data shows the name is currently falling.