Brennon is a distinctive boys' name in United States, ranking #1206 in 2004 with 126 recorded births. The name reached its all-time peak in 2009 with 189 births ranking #1028. Since 1996, the popularity has decreased by 10.6%. In 2004, approximately 1 in every 15,752 boys born was named Brennon. FALLING Recent data shows the name is currently falling.