Gannon is a distinctive boys' name in United States, ranking #1160 in 2009 with 156 recorded births. The name reached its all-time peak in 2014 with 751 births ranking #414. Since 1996, the popularity has increased by 116.7%. In 2009, approximately 1 in every 12,713 boys born was named Gannon. FALLING Recent data shows the name is currently falling.