John McMahon worked as “Electrician” in 1910 (industry “Street Railway”). He lived at 83 Homer Ave in Cortland in 1910. His mother was Catherine McMahon.
Census sources: 1910 census, 1910: Catherine McMahon
| Born | About 1880 |
|---|---|
| Race | White |
| Sex | Male |
| Person ID | 1138 |