| Suh (10,937) | Sulivan (27,442) | Sullivan (1,096,698) |
| Summer (25,775) | Summerlin (10,873) | Summers (213,620) |
| Summerville (14,560) | Sumner (67,174) | Sumpter (19,124) |
| Sun (41,702) | Sundberg (10,581) | Sunderland (16,022) |
| Sung (26,181) | Surber (10,616) | Susan (11,406) |
| Sussman (13,701) | Suter (19,171) | Sutherland (111,286) |
| Sutphin (9,957) | Sutter (35,459) | Suttle (10,609) |
| Suttles (12,055) | Sutton (360,515) | Svoboda (15,432) |
| Swafford (26,893) | Swaim (14,075) | Swain (100,968) |
| Swallow (10,137) | Swan (109,187) | Swaney (13,926) |
| Swank (30,082) | Swann (36,212) | Swanson (315,298) |
| Swart (14,516) | Swartz (123,706) | Swearingen (22,912) |
| Sweat (29,168) | Sweeney (222,997) | Sweeny (30,609) |
| Sweet (135,423) | Sweitzer (13,102) | Swenson (87,567) |
| Swett (12,732) | Swick (13,743) | Swift (109,627) |
| Swindell (11,309) | Swindle (13,346) | Swink (11,249) |
| Swinney (12,628) | Swisher (35,543) | Switzer (49,039) |
| Swope (30,340) | Syed (11,364) | Sykes (92,928) |
| Sylvester (70,877) | Sylvia (23,312) | Synder (14,200) |
| Szabo (17,700) | Szymanski (21,861) |
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