| William Simms | William Simms (Feinmechaniker) | William Simon |
| William Simonton | William Simpson | William Simpson (Künstler) |
| William Sims | William Sims Bainbridge | William Sinclair |
| William Sinclair (Adliger, † nach 1358) | William Sinclair (Adliger, † vor 1303) | William Sinclair (Bischof) |
| William Sinclair (Ritter) | William Sinclair, 1. Earl of Caithness | William Singleton Young |
| William Sinkford | William Sio | William Sistrom |
| William Skate | William Skeoch Cumming | William Skirving |
| William Skudlarek | William Skurla | William Skylstad |
| William Slade | William Slade (Politiker) | William Slade (Tauzieher) |
| William Slater | William Slattery | William Slavens McNutt |
| William Sleator | William Slichter | William Slim |
| William Slim, 1. Viscount Slim | William Sloan | William Sloane Coffin |
| William Slosson Lincoln | William Sly | William Sly (Schauspieler) |
| William Small | William Small (Gelehrter) | William Smallwood |
| William Smathers | William Smeaton | William Smellie |
| William Smellie (Enzyklopädist) | William Smellie (Mediziner) | William Smith |
| William Smith (Boxer) | William Smith (Geologe) | William Smith (Lexikograf) |
| William Smith (Mormone) | William Smith (Politiker, 1728) | William Smith (Politiker, 1751) |
| William Smith (Politiker, 1762) | William Smith (Politiker, 1797) | William Smith (Politiker, vor 1782) |
| William Smith (Radsportler) | William Smith (Ringer) | William Smith (Schauspieler) |
| William Smith (Schwimmer) | William Smith (Seefahrer) | William Smith (Sportschütze) |
| William Smith Clark | William Smith College | William Smith Easton |
| William Smith House | William Smith King | William Smith O'Brien |
| William Smith O’Brien | William Smith O’Brien (Politiker, 1803) | William Smith O’Brien (Politiker, 1862) |
| William Smith Tillett | William Smith, 4. Viscount Hambleden | William Smithe |
| William Smithers | William Smyth | William Smyth (Politiker) |
| William Snow | William Snow (Schauspieler) | William Soden Hastings |
| William Sohmer | William Solon Dellinger | William Somers Mailliard |
| William Somerset Maugham | William Sonntag | William Sonsteng |
| William Sorell | William Sorrell | William Soulis |
| William Southcombe Lloyd Webber | William Souza | William Sowden Sims |
| William Spafford | William Sparks | William Speirs Bruce |
| William Spence | William Spence (Entomologe) | William Spence Urquhart |
| William Spencer | William Spencer (Leichtathlet) | William Spencer (Radsportler) |
| William Spencer Barrett | William Spencer Vickrey | William Spooner |
| William Spottiswoode | William Sprague | William Sprague (Politiker, 1799) |
| William Sprague (Politiker, 1809) | William Sprague (Politiker, 1830) | William Spring Hubbell |
| William Springer | William Springsteen | William Sproul |
| William Spry | William Squire Kenyon | William St John Brodrick, 1. Earl of Midleton |
| William St. John Brodrick, 1. Earl of Midleton | William St. John Forman | William St. Onge |
| William Stadie | William Stafford | William Stafford († 1556) |
| William Stafford (Dichter) | William Stainton Moses | William Stamer |
| William Stanbery | William Standish Knowles | William Stanier |
| William Stanley | William Stanley (Erfinder) | William Stanley (Ritter) |
| William Stanley Baker | William Stanley Braithwaite | William Stanley Haseltine |
| William Stanley Jevons | William Stanley Mazeroski | William Stanley Merwin |
| William Stanley Vann | William Stanley, 3. Baron Monteagle | William Stanley, 6. Earl of Derby |
| William Stanton | William Stapley | William Starke Rosecrans |
| William Starling Burgess | William Starling Sullivant | William Starmer |
| William Starr Miller | William Starr Miller I. | William States Lee |
| William Staveley | William Stedman | William Steele |
| William Steele Holman | William Steeves | William Stefanov |
| William Steffen | William Steig | William Stein |
| William Steinberg | William Steinitz | William Steinkamp |
| William Steinkraus | William Steinmetz | William Steinway |
| William Stenger | William Stephani | William Stephen Morgan |
| William Stephen Skylstad | William Stephens | William Stephens (Politiker, 1671) |
| William Stephens (Politiker, 1859) | William Stephens Smith | William Stephenson |
| William Stephenson (Spion) | William Sterling Cole | William Sterling Parsons |
| William Sterling Youngman | William Stern | William Sterndale Bennett |
| William Sterrett Ramsey | William Stevens Fielding | William Stevens House |
| William Stevenson | William Stevenson (Leichtathlet) | William Stevenson Hoyte |
| William Stevenson Meyer | William Stewart | William Stewart (Kartograf) |
| William Stewart (Politiker, 1810) | William Stewart Alexander | William Stewart Duke-Elder |
| William Stewart Halsted | William Stewart Halstedt | William Stewart MacGeorge |
| William Stewart Mitchell d'Urban | William Stewart Mitchell D'Urban | William Stewart Mitchell D’Urban |
| William Stewart Mitchell d’Urban | William Stewart Roddie | William Stewart Ross |
| William Stickney | William Stickney (Golfspieler) | William Stigler |
| William Stiles Bennet | William Still | William Still (Bürgerrechtler) |
| William Stimpson | William Stirling | William Stirling-Hamilton |
| William Stirling-Hamilton, 10. Baronet | William Stirling-Maxwell | William Stokes |
| William Stokoe | William Stone | William Stone (Gouverneur) |
| William Stone (Politiker) | William Stonor | William Storrs Cole |
| William Story | William Stott | William Stoughton |
| William Stoughton (Richter) | William Stout | William Stowe |
| William Stradling | William Strang | William Strang (Fußballspieler) |
| William Strang (Künstler) | William Strang, 1. Baron Strang | William Stratton |
| William Straube | William Street Historic District | William Strickland |
| William Strickland (Architekt) | William Strong | William Strong (Jurist) |
| William Strong (Politiker) | William Strong House | William Strutt |
| William Stuart | William Stuart (Erzbischof) | William Stuart (Marineoffizier) |
| William Stuart (Politiker, 1798) | William Stuart (Politiker, 1825) | William Stuart Long |
| William Stuart McKerrow | William Stuart Symington | William Stuart-Houston |
| William Stubbs | William Studeman | William Stuhr |
| William Stukeley | William Sturgeon | William Sturgis Bigelow |
| William Sturgiss Lind | William Sturrock Maxwell | William Styles |
| William Styron | William Sublette | William Suermondt |
| William Suff | William Suhaib Webb | William Suida |
| William Sullivan | William Sullivant | William Sulzer |
| William Summer Johnson | William Summers | William Sunsing |
| William Sutherland | William Sutherland (Physiker) | William Sutherland (Politiker) |
| William Sutherland Dun | William Sutherland Maxwell | William Sutherland, 2. Earl of Sutherland |
| William Sutherland, 3. Earl of Sutherland | William Sutton | William Sutton Moore |
| William Swainson | William Swan | William Swan (Diplomat) |
| William Swan Garvin | William Swan, 1. Baronet | William Sweet |
| William Swinton | William Sydeman | William Sydney Porter |
| William Sydney Wilson | William Syer Bristowe | William Sykes |
| William Sykes (Fußballspieler) | William Sylvester | William Sylvester Harley |
| William Sylvester Silkworth | William Sylvester Taylor | William Symington |
| William Szathmary | William Szekely | William T. Anderson |
