By Name
Updated December 2009
Updated December 2009
| A - B | C - D | E - G | H - K | L - M | N - P | Q - S | T - V | W - Z |
| First Name | Last Name | City | State | Country | Kennel Name | Date Joined |
| Rakestraw | Jean | Olympia | WA | Selene Mastiffs | 2003 | |
| Ramsay | Nancy West | Bonifay | FL | Trueheart Mastiffs | 1988 | |
| Raudenbush | Matthew | Ottsville | PA | Gunslinger Mastiffs | 1997 | |
| Rebman | Mary | Lindale | GA | 2004 | ||
| Reece | Donna | Chardon | OH | Spring Hollow Mastiffs | 2006 | |
| Reed | Jennifer | Carmel | CA | After Hours Mastiffs | 2008 | |
| Reese | Brian | Ravenna | OH | Genisis Mastiffs | 2005 | |
| Reindt | Deborah-Lee | Marion | IN | 2003 | ||
| Reither | Marty | Bowling Green | OH | Lilac Acres | 1994 | |
| Reynolds | Kathleen | Waiuku | New Zealand | 2009 | ||
| Richie | Shirley | Dearborn | MO | Spreading Oak | 1970 | |
| Richmond | Vala L | Lynnwood | WA | Rasalas Mastiffs | 2009 | |
| Roach | Melissa | Sparta | NC | 2007 | ||
| Roach, Sr. | John B. | Bremen | GA | Blackhaven | 1987 | |
| Roberts | Debbie | Portland | OR | 2007 | ||
| Robertson | Cora | Dallas | TX | Pine Valley Mastiffs | 2009 | |
| Robertson | Allison Gardner | Earlysville | VA | Clearview | 1986 | |
| Robison | Karen | Silverton | OR | Silvercrest Mastiffs | 2002 | |
| Rocha | Dr Carlos Roberto | Sao Paulo-Sp | BRAZIL | Chaputepek Mastiffs | 2006 | |
| Rockwell-Heins | Barbara J. | Marlton | NJ | 2001 | ||
| Rogers | Douglas B. | Manakin-Sabot | VA | Royall | 1991 | |
| Rohwer-Nutter | Patti | Sun Prairie | WI | 2008 | ||
| Roland | Louise | Custer | WA | Stellar Mastiffs | 1995 | |
| Roloff | Dawn | Grafton | WI | 1998 | ||
| Roman-Ortiz | Norma I. | Howell | NJ | 1995 | ||
| Rosa | Mary E. | Northfield | CT | 1992 | ||
| Routten | Kay Q. | Hampton | VA | Creekview | 1987 | |
| Roventini | Bruce | Houston | TX | Casa dei Giganti | 1993 | |
| Roy | Sheldon | Alberta | CANADA | Shelanna | 2002 | |
| Ruoto | Maria | E Stroudsburg | PA | Dunraven Mastiffs | 2006 | |
| Ryan | Michael | Roseville | MN | Bur Oak Mastiffs | 2006 | |
| Sanchez | Joseph | Murrieta | CA | Southport | 1985 | |
| Sanchez | Carla | Murrieta | CA | Southport | 1985 | |
| Sanders | Anita L | Republic | WA | Rainy Days | 2005 | |
| Sather | Darr Ell | Woodinville | WA | Northwood | 1984 | |
| Saylor | Jenny | Iowa City | IA | 2000 | ||
| Sbarra Dillon | Pam | Shawnee | KS | Dillon | 2001 | |
| Schmitt | Christopher | Titusville | FL | 2007 | ||
| Schubert | Max | Charlottesville | VA | 2007 | ||
| Scott | Holly | Loveland | CO | Eldorado | 1987 | |
| Serdich | Nancy | Berkeley Springs | WV | Honalee | 2003 | |
| Sessions | Porsche | Rigby | ID | Mountain Time Mastiffs | 2008 | |
| Settlemyre-Finley | Teri | Greensboro | NC | 2007 | ||
| Severson | Scott | Westville | IN | Hoosier Mastiffs | 2000 | |
| Sexton | Marsha | Tampa | FL | 1999 | ||
| Sharp | Stephanie | Cherry Valley | CA | Goldrush Mastiffs | 2006 | |
| Shellans | Natalie A. | Woodland | WA | 1992 | ||
| Sherlock | Lynn | Mt Clare | WV | Lyndon Mastiffs | 1977 | |
| Sherman | GG | Dallas | TX | Pine Valley Mastiffs | 2009 | |
| Shutt | Brady | Iowa City | IA | 2000 | ||
| Shutts | Terrance | Broken Arrow | OK | 1999 | ||
| Shutts | Karen K. | Broken Arrow | OK | 2004 | ||
| Silvaggi | Robert G. | Brookfield | CT | Mistletoe | 1981 | |
| Simmonds | Gabrielle | Emerald | VI | Australia | Marstenmoor | 2005 |
| Simmons | Barbara | Brooksville | FL | Blackheath | 1988 | |
| Simon | Elizabeth | Batavia | OH | Country Creek | 1983 | |
| Simons | Lisa D. | Milwaukee | WI | Old Bailey Mastiffs | 1994 | |
| Sirignano | Karen L. | Pittsboro | NC | Falling Leaf | 2000 | |
| Sivley | Linda | Sahuarita | AZ | 1996 | ||
| Smilowitz | Alicia B. | Mill Neck | NY | Romany Kennels, AKC Reg | 1992 | |
| Smith | Lester | Magnolia | TX | 1997 | ||
| Smith | Ann | Bronston | KY | Utopia Kennel | 2002 | |
| Smith | Carol Ann | Chico | CA | Kanigo Mastiffs | 2006 | |
| Sobecki | Susan | Horsham | PA | 2004 | ||
| Sohn | Courtney | Corvallis | OR | Helios Mastiffs | 2008 | |
| Sottile | Isabell M. | Richmond | IL | Bobaras | 2004 | |
| Soviar | Michelle A | Oregon | OH | 2001 | ||
| Spalding | Diane | Salisbury | MD | Berystede | 1995 | |
| Sparks | Roby | Oklahoma City | OK | Sparks | 2006 | |
| Speer | Mary Lynn | Glenwood City | WI | Kinsmen | 1992 | |
| Spiars | Early | College Station | TX | Hope Creek | 1993 | |
| Spiars | Jackie | College Station | TX | Hope Creek | 1993 | |
| Stephens | Judith A. | Boyertown | PA | Ravenwyd | 1973 | |
| Stewart | Cynthia | Winchester | TN | 1988 | ||
| Stewart | Jacqueline A. | Bexley | OH | 1997 | ||
| Still | Bonnie | Independence | MO | 1992 | ||
| Stinson | Brad | Iva | SC | Stinson Farms | 1994 | |
| Stivason | Mike | Kittanning | PA | Stivalley | 2009 | |
| Stivason | Katherine | Kittanning | PA | Stivalley | 2009 | |
| Storeshaw | Lynn | New Norway, Alberta | CANADA | Lynnspride | 1992 | |
| Stringer | Jan | Ridgeland | MS | Dixieland Mastiffs | 2002 | |
| Stringer | Jimmy | Ridgeland | MS | Dixieland Mastiffs | 2008 | |
| Stuber | Deborah J. | Saint Charles | IL | 2004 | ||
| Sumner | Alison Kay | Owensboro | KY | Freedom Mastiffs | 2008 | |
| Sviat | Dawn Sandberg- | Longmont | CO | Beaumont Mastiffs | 2007 | |
| Sviat | Steven | Longmont | CO | Beaumont Mastiffs | 2007 | |
| Swartz | Pauliina | West Newbury | MA | 2007 | ||
| Swift | Dave | Osgoode - ONT | ON | CANADA | Knighterrant | 1995 |
| Swords | Susan | Scott Depot | WV | Double Edge | 1990 | |
| Systo | Shiela | Hudson | IL | 2001 | ||
| Szalkowski | June | Union | NJ | 2001 |