Brennon is a distinctive boys' name in United States, ranking #867 in 1999 with 174 recorded births. The name reached its all-time peak in 2009 with 189 births ranking #1028. Since 1996, the popularity has increased by 23.4%. In 1999, approximately 1 in every 11,035 boys born was named Brennon. FALLING Recent data shows the name is currently falling.