Brennen is a distinctive boys' name in United States, ranking #2148 in 2018 with 65 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 74.4%. In 2018, approximately 1 in every 27,930 boys born was named Brennen. FALLING Recent data shows the name is currently falling.