Tip: To quickly navigate to a surname board, enter the surname in the "Find a Board" search above.
| Board | Threads | Messages | Last Post |
| Oppeneer | 2 | 5 | 13 Feb 2012 |
| Oppenheim | 30 | 85 | 2 Apr 2014 |
| Oppenheimer | 47 | 116 | 9 Nov 2014 |
| Oppenlander | 8 | 41 | 3 Apr 2015 |
| Opper | 27 | 96 | 12 Jan 2015 |
| Opperman | 79 | 167 | 7 May 2015 |
| Oppermann | 25 | 41 | 26 Oct 2014 |
| Oppersma | 1 | 1 | 11 Jul 2001 |
| Oppert | 2 | 2 | 26 Aug 2013 |
| Oppertshauser | 4 | 15 | 12 Dec 2013 |