Brennen is a distinctive boys' name in United States, ranking #629 in 2010 with 387 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has increased by 52.4%. In 2010, approximately 1 in every 4,957 boys born was named Brennen. FALLING Recent data shows the name is currently falling.