Gannon is a distinctive boys' name in United States, ranking #1018 in 2007 with 187 recorded births. The name reached its all-time peak in 2014 with 751 births ranking #414. Since 1996, the popularity has increased by 159.7%. In 2007, approximately 1 in every 11,098 boys born was named Gannon. FALLING Recent data shows the name is currently falling.