Brennen is a distinctive boys' name in United States, ranking #583 in 2002 with 367 recorded births. The name reached its all-time peak in 2009 with 455 births ranking #580. Since 1996, the popularity has increased by 44.5%. In 2002, approximately 1 in every 5,290 boys born was named Brennen. FALLING Recent data shows the name is currently falling.