People with Last Name O CALLAHAN
There are 6 known people with the name O CALLAHAN. The combination of O and CALLAHAN is most frequently found in California and Illinois Here you can find the geographic distribution of this names in all states:
| 1 | CALIFORNIA | 2 | CALIFORNIA | 2 |
| 1 | ILLINOIS | 1 | ILLINOIS | 1 |
| 1 | MISSOURI | 1 | MISSOURI | 1 |
| 1 | PENNSYLVANIA | 1 | PENNSYLVANIA | 1 |
| 1 | WISCONSIN | 1 | WISCONSIN | 1 |