Meaning Gannon means light in color and skin. Origin of Gannon Celtic , Irish Popular Middle Names Lee, Levi, Michael, Miller, Nelson, Richard, Robert, Thomas, Wade, Wayne Pronunciation 🔊 Listen Gannon GAN-on Similar Names Gilen Galeno Nur Argi Ajiad Teobaldo Urien Ganiru Finneen Abdul-Muqtadir Year by Year Popularity of Gannon