Gannon is a moderately popular boys' name in United States, ranking #414 in 2014 with 751 recorded births. This places Gannon in the top 3% of ranked US boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2014 with 751 births ranking #414. Since 1996, the popularity has increased by 943.1%. In 2014, approximately 1 in every 2,557 boys born was named Gannon. FALLING Recent data shows the name is currently falling.