Brennen is a distinctive boys' name in United States, ranking #1014 in 2013 with 192 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 24.4%. In 2013, approximately 1 in every 9,850 boys born was named Brennen. FALLING Recent data shows the name is currently falling.