My great grand uncle John Edward Gannon was born on November 18, 1867, in Roxbury, Massachusetts, his mother, Sarah, was 27. He married Lizzie A. Sawyer Smart on November 5, 1906, in Newburyport, Massachusetts. The 1880 Federal Census indicated he was living in Bitter Root Valley, Missoula, Montana.
He died on April 27, 1915, at the age of 47.
The name "Gannon" is Irish, a reduced Anglicized form of Gaelic Mag Fhionnáin, a patronymic from the personal name Fionnán. This name, from a diminutive of fionn ‘white’, ‘fair’, was borne by several early Irish saints.