Gannon is a distinctive boys' name in United States, ranking #1441 in 2011 with 114 recorded births. The name reached its all-time peak in 2014 with 751 births ranking #414. Since 1996, the popularity has increased by 58.3%. In 2011, approximately 1 in every 16,658 boys born was named Gannon. FALLING Recent data shows the name is currently falling.