Gannon is a distinctive boys' name in United States, ranking #1034 in 2008 with 184 recorded births. The name reached its all-time peak in 2014 with 751 births ranking #414. Since 1996, the popularity has increased by 155.6%. In 2008, approximately 1 in every 11,087 boys born was named Gannon. FALLING Recent data shows the name is currently falling.