Brennen is a distinctive boys' name in United States, ranking #1202 in 2014 with 153 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 39.8%. In 2014, approximately 1 in every 12,552 boys born was named Brennen. FALLING Recent data shows the name is currently falling.