Gannon is a distinctive boys' name in United States, ranking #1196 in 1999 with 107 recorded births. The name reached its all-time peak in 2014 with 751 births ranking #414. Since 1996, the popularity has increased by 48.6%. In 1999, approximately 1 in every 17,945 boys born was named Gannon. FALLING Recent data shows the name is currently falling.