| Radmacher | 1 |
| Radmacker | 1 |
| Radulovic | 1 |
| Raesler | 1 |
| Ragan | 6 |
| Raghair | 1 |
| Ragsdale | 2 |
| Rahm | 1 |
| Rainey | 3 |
| Rainwater | 3 |
| Ralls | 2 |
| Ralph | 1 |
| Ralston | 1 |
| Ramage | 1 |
| Rambo | 1 |
| Ramey | 1 |
| Rampula | 1 |
| Ramsey | 4 |
| Randall | 1 |
| Randolph | 1 |
| Range | 1 |
| Rankin | 3 |
| Rankins | 3 |
| Ransom | 11 |
| Rasor | 1 |
| Ratcliff | 1 |
| Rathburn | 2 |
| Rathrock | 1 |
| Ratzloff | 1 |
| Rauche | 1 |
| Raudebaugh | 1 |
| Ray | 5 |
| Rayborn | 1 |
| Raynon | 1 |
| Real | 1 |
| Reames | 1 |
| Reams | 1 |
| Reber | 1 |
| Recer | 28 |
| Rector | 11 |
| Redd | 1 |
| Redden | 1 |
| Redding | 1 |
| Redman | 3 |
| Redmond | 1 |
| Redus | 2 |
| Reed | 27 |
| Reel | 1 |
| Reese | 3 |
| Reeter | 1 |
| Reeves | 24 |
| Refseth | 2 |
| Reglin | 2 |
| Rehder | 1 |
| Reibe | 1 |
| Reid | 7 |
| Reidel | 1 |
| Reimer | 7 |
| Reimers | 1 |
| Reinking | 2 |
| Rejkowski | 1 |
| Remey | 11 |
| Reno | 1 |
| Renswald | 3 |
| Renton | 1 |
| Reynolds | 18 |
| Rhoads | 7 |
| Rhodes | 10 |
| Rhonimus | 1 |
| Rials | 4 |
| Ricci | 1 |
| Rice | 2 |
| Rich | 5 |
| Richard | 1 |
| Richards | 1 |
| Richardson | 22 |
| Richarme | 3 |
| Richey | 6 |
| Richie | 2 |
| Richley | 1 |
| Richlin | 4 |
| Rick | 1 |
| Rickles | 1 |
| Ricks | 1 |
| Riddell | 1 |
| Riddle | 1 |
| Rider | 2 |
| Ridge | 2 |
| Ridgely | 1 |
| Rigby | 2 |
| Riggle | 1 |
| Riggles | 2 |
| Riggs | 2 |
| Righter | 4 |
| Rigney | 1 |
| Riker | 1 |
| Rile | 1 |
| Riley | 2 |
| Rinehart | 3 |
| Ring | 1 |
| Rinks | 1 |
| Rinna | 5 |
| Rion | 1 |
| Ripley | 1 |
| Rish | 1 |
| Risinger | 1 |
| Risley | 1 |
| Ritchie | 14 |
| Rivers | 1 |
| Roark | 21 |
| Robbins | 11 |
| Roberson | 3 |
| Robert | 5 |
| Roberts | 67 |
| Robertshaw | 2 |
| Robertson | 8 |
| Robins | 1 |
| Robinson | 14 |
| Robison | 3 |
| Roble | 2 |
| Robley | 1 |
| Rockwood | 1 |
| Rodgers | 3 |
| Roeder | 1 |
| Roelse | 1 |
| Rogers | 48 |
| Roland | 1 |
| Rollings | 3 |
| Rollins | 18 |
| Romans | 4 |
| Romero | 1 |
| Romery | 1 |
| Rono | 3 |
| Rook | 10 |
| Roop | 1 |
| Roosa | 1 |
| Roper | 3 |
| Rose | 7 |
| Rosella | 1 |
| Rosenberger | 2 |
| Rosevear | 1 |
| Ross | 12 |
| Rosser | 1 |
| Rouse | 1 |
| Rout | 1 |
| Routt | 1 |
| Rovedatti | 2 |
| Rowell | 2 |
| Rowland | 1 |
| Rowlett | 3 |
| Rowley | 13 |
| Royals | 1 |
| Rozella | 1 |
| Rubush | 1 |
| Ruenk | 1 |
| Ruff | 1 |
| Rummans | 1 |
| Rummel | 5 |
| Runnels | 1 |
| Runyan | 6 |
| Runyon | 1 |
| Rupp | 1 |
| Rush | 249 |
| Rusk | 3 |
| Russell | 20 |
| Russum | 1 |
| Rust | 1 |
| Rutherford | 15 |
| Ryan | 12 |
| Ryans | 1 |
updated - GMB 06/16/07