409 results
| Oliver | 3882 |
| Owen | 3060 |
| Osborne | 2983 |
| Obrien | 2382 |
| Olsen | 1745 |
| Owens | 1585 |
| Orr | 1384 |
| Ong | 1205 |
| Oakley | 1008 |
| Oates | 995 |
| Oconnor | 975 |
| Oneill | 933 |
| Osborn | 722 |
| Orchard | 661 |
| Ogden | 655 |
| Osman | 641 |
| Oldfield | 626 |
| Oakes | 590 |
| Odonnell | 560 |
| Ogilvie | 551 |
| Otto | 518 |
| Osullivan | 488 |
| Olive | 481 |
| Oxley | 435 |
| Oconnell | 418 |
| Oldham | 414 |
| Osmond | 390 |
| Overton | 377 |
| Oliveira | 377 |
| Odgers | 375 |
| Oswald | 372 |
| Omar | 370 |
| Olsson | 368 |
| Oreilly | 341 |
| Oshea | 334 |
| Olson | 327 |
| Okeefe | 324 |
| Opie | 282 |
| Oleary | 270 |
| Obst | 266 |
| Ormsby | 258 |
| Otoole | 240 |
| Oneil | 237 |
| Ogle | 237 |
| Ohara | 233 |
| Orlando | 220 |
| Organ | 220 |
| Osbourne | 216 |
| Orton | 214 |
| Ord | 205 |
| Ortiz | 201 |
| Orourke | 197 |
| Oram | 196 |
| Ohalloran | 190 |
| Olds | 185 |
| Old | 179 |
| Ott | 179 |
| Ogrady | 179 |
| Odell | 178 |
| Omalley | 178 |
| Okeeffe | 176 |
| Overall | 175 |
| Ocallaghan | 167 |
| Oloughlin | 166 |
| Oxford | 159 |
| Olivier | 154 |
| Omara | 153 |
| Omeara | 152 |
| Oats | 150 |
| Onley | 150 |
| Olver | 142 |
| Ogg | 138 |
| Ortega | 136 |
| Ocampo | 136 |
| Odea | 135 |