Gannon is a distinctive boys' name in United States, ranking #1436 in 1996 with 72 recorded births. This places Gannon in the top 14% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 751 births ranking #414. In 1996, approximately 1 in every 26,309 boys born was named Gannon. FALLING Recent data shows the name is currently falling.