| Rick (32,000) | Rickard (30,241) | Ricker (40,088) |
| Rickert (17,545) | Ricketts (38,614) | Rickey (14,508) |
| Rickman (20,582) | Ricks (53,764) | Rico (41,080) |
| Riddell (15,575) | Riddick (21,540) | Riddle (115,415) |
| Ridenour (26,901) | Rideout (11,313) | Rider (82,537) |
| Ridge (25,063) | Ridgeway (35,197) | Ridgway (21,842) |
| Ridley (40,070) | Riedel (19,179) | Riegel (10,803) |
| Rieger (17,461) | Rielly (10,408) | Ries (25,419) |
| Rife (21,746) | Riffin (11,206) | Riffle (16,270) |
| Rigby (19,532) | Rigdon (14,363) | Rigg (11,109) |
| Riggins (32,182) | Riggle (13,368) | Riggs (160,198) |
| Right (76,024) | Rigney (15,331) | Rigsby (21,749) |
| Riker (14,721) | Riley (633,720) | Rinaldi (16,178) |
| Rincon (25,122) | Rinehart (50,917) | Ring (64,902) |
| Ringer (18,723) | Rink (10,008) | Rinker (17,214) |
| Rio (10,893) | Riordan (25,772) | Rios (254,217) |
| Ripley (40,302) | Risley (17,525) | Risner (11,678) |
| Ritchey (30,593) | Ritchie (97,233) | Rittenhouse (20,619) |
| Ritter (140,292) | Ritz (25,933) | Rivard (13,236) |
| Rivas (136,360) | Rivera (955,023) | Rivero (18,655) |
| Rivers (123,889) | Rives (11,033) | Rizzo (48,270) |
| Roach (208,361) | Roan (12,588) | Roark (43,241) |
| Robb (61,011) | Robbins (316,004) | Roberson (247,597) |
| Robert (61,192) | Roberts (1,613,189) | Robertson (680,197) |
| Robeson (14,517) | Robey (16,671) | Robin (22,937) |
| Robinett (13,750) | Robinette (19,516) | Robins (62,218) |
| Robinson (2,153,776) | Robison (134,599) | Robledo (23,019) |
| Robles (155,479) | Robson (28,697) | Roby (34,916) |
| Rocco (19,364) | Rocha (98,815) | Roche (66,463) |
| Rochelle (10,483) | Rock (86,646) | Rockwell (56,069) |
| Rockwood (11,424) | Rodarte (11,855) | Rodas (14,704) |
| Roddy (21,885) | Rode (10,911) | Roden (20,309) |
| Roderick (26,726) | Rodger (11,666) | Rodgers (349,788) |
