Note: all lines on the page with surname O'Brien are listed, see the notes on the page for the specific lines they apply to.
| Suggested Surname | Transcribed Surname | Givens | Province | District | Subdistrict | Subdistrict Number | Page | Line |
|---|---|---|---|---|---|---|---|---|
| Obrien | O'Brien | John | ON | ADDINGTON | Sheffield | o-2 | 11 | 6 |
| Obrien | O'Brien | Mary E. | ON | ADDINGTON | Sheffield | o-2 | 11 | 7 |
| Obrien | O'Brien | Wm. H. | ON | LAMBTON (West/Ouest) | Plympton | c-4 | 3 | 2 |
| Obrien | O'Brien | Julia | ON | LAMBTON (West/Ouest) | Plympton | c-4 | 3 | 3 |
| Obrien | O'Brien | William | ON | LAMBTON (West/Ouest) | Plympton | c-4 | 3 | 4 |
| Obrien | O'Brien | David | ON | LAMBTON (West/Ouest) | Plympton | c-4 | 3 | 5 |