| Rodman (21,830) | Rodney (13,125) | Rodrigue (28,082) |
| Rodrigues (71,568) | Rodriguez (2,560,585) | Rodriquez (249,764) |
| Roe (110,772) | Roebuck (13,362) | Roeder (22,877) |
| Roemer (11,701) | Rogan (19,278) | Roger (31,406) |
| Rogers (1,280,640) | Rohde (21,178) | Rohr (20,379) |
| Rohrer (23,808) | Rojas (201,758) | Rojo (13,189) |
| Roland (75,037) | Roldan (22,147) | Rolfe (15,266) |
| Roll (20,635) | Roller (28,318) | Rollins (130,425) |
| Roman (163,746) | Romano (73,714) | Romans (9,912) |
| Rome (13,133) | Romeo (19,022) | Romer (11,729) |
| Romero (439,720) | Romine (21,954) | Romo (43,060) |
| Ron (11,422) | Ronald (10,863) | Ronan (13,392) |
| Roney (24,457) | Rood (24,983) | Roof (14,367) |
| Rook (19,730) | Rooks (68,114) | Rooney (73,964) |
| Roop (13,829) | Roos (15,656) | Root (96,465) |
| Roper (71,053) | Roque (24,548) | Rosa (90,889) |
| Rosado (63,847) | Rosales (126,788) | Rosario (107,638) |
| Rosas (77,137) | Roscoe (15,480) | Rose (649,492) |
| Roseberry (12,317) | Roseman (13,103) | Rosen (84,503) |
| Rosenbaum (34,124) | Rosenberg (108,406) | Rosenberger (23,969) |
| Rosenblatt (12,782) | Rosenblum (14,942) | Rosenfeld (21,634) |
| Rosenthal (73,828) | Ross (1,044,799) | Rosser (24,273) |
| Rossi (72,525) | Rossiter (11,098) | Rossman (19,798) |
| Rost (16,728) | Roth (237,878) | Rothman (17,254) |
| Rothrock (9,883) | Rothstein (11,922) | Rothwell (14,101) |
| Rounds (26,677) | Roundtree (20,483) | Rountree (21,122) |
| Rourke (34,664) | Rouse (100,886) | Roush (40,540) |
| Rousseau (21,681) | Row (21,459) | Rowan (50,732) |
| Rowe (288,390) | Rowell (59,818) | Rowen (9,998) |
| Rowland (136,088) | Rowley (69,817) | Rown (214,724) |
| Roy (161,840) | Royal (46,401) | Roybal (11,244) |
| Royce (21,761) | Royer (37,796) | Royster (21,400) |
| Rtinez (12,654) | Rtiz (27,341) | Ruben (14,332) |
