Brennon is a distinctive boys' name in United States, ranking #1194 in 2006 with 140 recorded births. This places Brennon in the top 9% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 189 births ranking #1028. In 2006, approximately 1 in every 14,679 boys born was named Brennon. FALLING Recent data shows the name is currently falling.