Brennen is a distinctive boys' name in United States, ranking #2350 in 2020 with 57 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 77.6%. In 2020, approximately 1 in every 30,264 boys born was named Brennen. FALLING Recent data shows the name is currently falling.