Tip: To quickly navigate to a surname board, enter the surname in the "Find a Board" search above.
| Board | Threads | Messages | Last Post |
| Siebenaler | 13 | 68 | 9 May 2015 |
| Siebenaller | 1 | 1 | 27 Oct 2010 |
| Siebenberg | 0 | 0 | |
| Siebenbrock | 1 | 1 | 6 Nov 2009 |
| Siebenhaar | 9 | 14 | 27 Mar 2010 |
| Siebenhauser | 1 | 1 | 4 Jun 2011 |
| Siebeniecher | 1 | 1 | 27 Dec 2002 |
| Siebenlist | 6 | 11 | 29 Mar 2012 |
| Siebenmark | 1 | 1 | 8 Sep 2006 |
| Siebens | 8 | 13 | 20 Sep 2010 |