Brennon is a distinctive boys' name in United States, ranking #1325 in 2005 with 114 recorded births. The name reached its all-time peak in 2009 with 189 births ranking #1028. Since 1996, the popularity has decreased by 19.1%. In 2005, approximately 1 in every 17,519 boys born was named Brennon. FALLING Recent data shows the name is currently falling.