| O'Brien | P | | Lieutenant | CGHGSM (1) Bechuanaland
Source: Roll of the CGHGSM |
| O'Brien | P | | | District 1
Source: QSA and KSA rolls |
| O'Brien | P W | | | District 1
Source: QSA and KSA rolls |
| O'Brien | Patrick | 1293 | | Attested: Jul 1897. Source: CMP 41 |
| O'Brien | Patrick | 2080 | | Attested: Nov 1903. Source: CMP 41 |
| O'Brien | Patrick | 435 | Constable | Attested: Nov 1903. Source: CMP 41 |
| O'Brien | Patrick | 1614 | | Attested: Mar 1904. Source: CMP 41 |
| O'Brien | Philip William | | | District 1
Source: QSA and KSA rolls |
| O'Brien | Phillip | 1291 | | Attested: Jul 1897. Source: CMP 41 |
| O'Brien | R | | | District 1
Source: QSA and KSA rolls |
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