| Surname | Researcher | E-Mail Address | Post Date |
| O'Connor | Randy Mills | rmda@msn.com | 09/03/1999 |
| Rita Reid | rita45cw@echoweb.net | 01/28/2003 | |
| Odell | Maria Raymond | mariaraymond@afes.com | 03/15/2003 |
| O'Hearn | Sheila Jones | srjoneswest@aol.com | 07/28/2002 |
| O'Heron | Sheila Jones | srjoneswest@aol.com | 07/28/2002 |
| Tim O'Heron | toheron@yahoo.com | 01/03/2000 | |
| O'Herron | Sheila Jones | srjoneswest@aol.com | 07/28/2002 |
| O'Leary | Jean Cope | tcjhc@lexcominc.net | 02/10/2003 |
| O'Neal, O'Neil | Steven D. DeMoss | sddemoss@iland.net | 02/10/2003 |
| Offtendinger | Charlotte Aten | atenc3@aol.com | 02/02/2003 |
| Sharon Wakefield | swkefld@startel.net | 02/10/2003 | |
| Ogle | Laurie Bates | albates@milfordcable.net | 02/17/2003 |
| Oliver | Candice Archer | clarcher@worldnet.att.net | 01/26/2003 |
| Suzanne Garrett | sasmusgarrett2@cs.com | 02/11/2001 | |
| Olivier | Sharon Crary | sharon.crary@comcast.net | 05/14/2006 |
| Colleen Oliver-Woods | woodsfamily@vcn.com | 02/05/2003 | |
| Dennis Olivier | kb0lkt@rap.midco.net | 10/27/2002 | |
| Onstenk | Shaughn Roorda | Shaughn@pellaart.com | 02/10/2003 |
| Onstine | Nancy Hunsaker | nlh2002@attbi.com | 02/10/2003 |
| Shaughn Roorda | Shaughn@pellaart.com | 02/10/2003 | |
| David Roose | davidncheryl@yahoo.com | 05/26/1999 | |
| Ooyevaars | Walter Dirk Vos | westlake@efn.org | |
| Osbourn | Bess Wilson | emmettwilson@sbcglobal.net | 03/07/2006 |
| Osburn | Kendell W. "Kip" Phillips | ivhistory@cavenet.com | 01/24/2003 |
| Overkamp | Steven Lytwynec | sdlytwynec@yahoo.com | 02/15/2003 |
| Overton | Leslie Beebout-Adams | Beebster22@aol.com | 09/17/2004 |
| Shelley Carle-Kilgore | skilgore11@aol.com | 02/11/2003 | |
| Terri Main | litefoot@pcpartner.net | 01/02/2003 | |
| Rosemary Sansom | zillard@mcsi.net | 02/10/2003 |