Brennen is a distinctive boys' name in United States, ranking #650 in 2008 with 375 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has increased by 47.6%. In 2008, approximately 1 in every 5,440 boys born was named Brennen. FALLING Recent data shows the name is currently falling.