Brennen is a distinctive boys' name in United States, ranking #1977 in 2019 with 74 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has decreased by 70.9%. In 2019, approximately 1 in every 24,235 boys born was named Brennen. FALLING Recent data shows the name is currently falling.