John McMahon worked as “Plumber” in 1910 (industry “Hardware Store”). He lived at 35 Groton Ave in Cortland in 1910. He shared a census household with Dora E Bradley in 1910.
Census sources: 1910 census, 1910: Dora E Bradley
| Born | About 1878 |
|---|---|
| Race | White |
| Sex | Male |
| Person ID | 2083 |