| Rubenstein (18,654) | Rubin (75,983) | Rubino (14,411) |
| Rubio (86,389) | Ruble (21,215) | Ruby (38,670) |
| Ruch (12,888) | Rucker (90,874) | Rudd (49,796) |
| Ruddy (11,080) | Rude (16,527) | Rudolph (72,508) |
| Rudy (32,304) | Rue (21,109) | Rueda (13,316) |
| Ruelas (15,812) | Ruff (58,473) | Ruffin (43,417) |
| Rugg (11,072) | Ruggiero (20,667) | Ruggles (20,783) |
| Ruhl (17,753) | Ruiz (509,702) | Rule (23,946) |
| Rummel (12,349) | Rumsey (19,755) | Runge (15,707) |
| Runkle (11,233) | Runnels (17,441) | Runyan (23,134) |
| Runyon (28,775) | Rupe (9,934) | Rupert (28,973) |
| Rupp (44,596) | Ruppert (15,212) | Rusch (13,744) |
| Ruse (10,951) | Rush (161,927) | Rushing (56,684) |
| Rushton (11,933) | Rusk (16,584) | Russ (58,568) |
| Russel (86,826) | Russell (925,372) | Russo (143,633) |
| Rust (49,617) | Ruth (63,785) | Rutherford (112,575) |
| Rutkowski (16,882) | Rutland (10,835) | Rutledge (91,957) |
| Rutter (28,489) | Ruvalcaba (14,815) | Ruz (57,386) |
| Ryals (15,083) | Ryan (700,284) | Ryant (12,010) |
| Ryder (59,245) | Rye (15,994) |
