Brennen is a distinctive boys' name in United States, ranking #1261 in 2015 with 143 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 43.7%. In 2015, approximately 1 in every 13,400 boys born was named Brennen. FALLING Recent data shows the name is currently falling.