| William Phipps | William Pianu | William Piastra |
| William Pierce Butler | William Pierce Matthews | William Pierce Rogers |
| William Pimm | William Pinkney | William Piriz |
| William Pirrie | William Pitt | William Pitt Amherst |
| William Pitt Amherst, I conte Amherst | William Pitt il Giovane | William Pitt il giovane |
| William Pitt il Vecchio | William Pitt, I conte di Chatham | William Platt |
| William Playfair | William Pleeth | William Pleydell-Bouverie |
| William Pleydell-Bouverie, III conte di Radnor | William Pleydell-Bouverie, V conte di Radnor | William Pleydell-Bouverie, VII conte di Radnor |
| William Plunket | William Plunket, V barone Plunket | William Poel |
| William Pogue | William Pohlad | William Pollock |
| William Pollock McLaren | William Ponsonby | William Ponsonby, II conte di Bessborough |
| William Poole | William Pope Duval | William Poromaa |
| William Porter | William Poths | William Pottker |
| William Powell | William Powell Frith | William Powell Lear |
| William Prady | William Prescott | William Press |
| William Prest | William Preston Miller | William Price |
| William Price Hunt | William Prichard | William Priddy |
| William Primrose | William Prince | William Procter Remington |
| William Prout | William Prunier | William Prynne |
| William Pullar Jardine | William Pulteney | William Pulteney (generale) |
| William Pulteney Pulteney | William Quan Judge | William Quash |
| William Quevedo | William Quick | William Quiller Orchardson |
| William Quinn Buckner | William Quirós | William Quiros |
| William R D Fairbairn | William R. Burnett | William R. Cosentini |
| William R. Cotton | William R. D. Fairbairn | William R. Day |
| William R. Forstchen | William R. Heath Residence | William R. Hewlett |
| William R. King | William R. Marshall | William R. Merriam |
| William R. Moses | William R. Newman | William R. Nicoll |
| William R. Shafter | William R. Stoeger | William R. Tolbert |
| William R. Tolbert Jr. | William Rabkin | William Rabun |
| William Rackley III | William Rady | William Raeside |
| William Rafael Gonzalez | William Rafael Gonzalez Ruiz | William Rafael González |
| William Rafael González Ruiz | William Raffaeli | William Ragsdale |
| William Railton | William Raines | William Rainey Harper |
| William Rainey Marshall | William Ralph Blass | William Ralph Dean |
| William Ralph Miller | William Ramallo | William Ramsay |
| William Ramsay (astrologo) | William Ramsay, I barone di Panmure | William Ramsey Clark |
| William Randal Cremer | William Randolph Cole | William Randolph Cosentini |
| William Randolph Hearst | William Randolph Lovelace II | William Rankin Patton |
| William Rankine | William Raphael | William Rapuzzi |
| William Rarita | William Rarità | William Ratcliff |
| William Ratcliff (Kjui) | William Ratcliff (opera) | William Rawlins |
| William Rawson | William Ray Cyrus | William Ray Guy |
| William Rayleigh | William Raymond Philipson | William Raymond Seagrove |
| William Rémy | William Readdy | William Reais |
| William Reddington Hewlett | William Redfield | William Redford |
| William Reeves | William Regal | William Regis Fey |
| William Rehnquist | William Rehnquist Hubbs | William Reid |
| William Reid (allenatore di pallacanestro) | William Reid Pogue | William Reid Priddy |
| William Reith | William Remington | William Remington (atleta) |
| William Remington Moses | William Renshaw | William Reuben Applegarth |
| William Reynell Anson | William Reynolds | William Reynolds (attore) |
| William Ribeiro Soares | William Rice | William Richard Frisell |
| William Richard George Stanley | William Richard Gowers | William Richard Hamilton |
| William Richard Hoskins | William Richard Keating | William Richard Morris |
| William Richard Scott Thomas | William Richard Shaboe Doll | William Richardson |
| William Richardson Linton | William Richert | William Richmond Chase |
| William Ridout Wadsworth | William Rieflin | William Riker |
| William Riley Burnett | William Rivers | William Roache |
| William Robert Alford | William Robert Brooks | William Robert Broughton |
| William Robert Brown | William Robert Daly | William Robert Forstchen |
| William Robert Grove | William Robert Guerin | William Robert Hamilton |
| William Robert Hammond | William Robert Herman | William Robert Johnson |
| William Robert Kingsbury Wills Wilde | William Robert Klein Bryant | William Robert Leonard |
| William Robert McKay | William Robert Moon | William Robert Ogilvie-Grant |
| William Robert Orthwein | William Robert Robertson | William Robert Spencer |
| William Robert Taylor | William Robert Tice | William Robert Ware |
| William Robert Warshaw | William Robert Wills Wilde | William Robert Woodall III |
| William Roberts | William Roberts (atleta) | William Roberts (giocatore di football americano) |
| William Robertson | William Robertson (generale) | William Robertson (militare) |
| William Robertson (politico) | William Robertson (storico) | William Robertson Smith |
| William Robeyns | William Robinson | William Robinson (nuotatore) |
| William Robinson Clark | William Rocha Alves | William Rocky Gray |
| William Rodney Averitt | William Rodney Hudson | William Rodney Knowles |
| William Roerick | William Roger Van Horn | William Roland Hartston |
| William Ronald Dodds Fairbairn | William Ronald Durnan | William Ronald Reid |
| William Rory Gallagher | William Roscoe | William Rose |
| William Rose Benét | William Rosenbir Garcia | William Ross |
| William Ross (politico) | William Ross Ashby | William Ross Wallace |
| William Rosson | William Rowan Hamilton | William Rowe |
| William Rowley | William Roxburgh | William Roy Lyman |
| William Royce | William Roycroft | William Ruben Martínez Carreras |
| William Ruben Martinez Carreras | William Rubio | William Rufus |
| William Rufus Day | William Rufus de Vane King | William Rufus Shafter |
| William Rukard Hurd Hatfield | William Rupertus | William Ruschenberger |
| William Rush | William Rush Merriam | William Russ |
| William Russell | William Russell (1639-1683) | William Russell (attore 1884) |
| William Russell (attore 1924) | William Russell (attore statunitense) | William Russell (attore) |
| William Russell (Lord Mayor) | William Russell Collins | William Russell Enoch |
| William Russell Grace | William Russell van Horn | William Russell, I duca di Bedford |
| William Russell, VIII duca di Bedford | William Russo | William Russo (musicista) |
| William Rutherford | William Ruthven, I conte di Gowrie | William Ruto |
| William Rutter Dawes | William Ryan | William Ryan Key |
| William Ryder | William S. Burroughs | William S. Campbell |
| William S. Darling | William S. Davis | William S. Gilbert |
| William S. Harney | William S. Hart | William S. Hatcher |
| William S. Heckscher | William S. Jennings | William S. Knowles |
| William S. Maugham | William S. McArthur | William S. McArthur, Jr. |
| William S. Paley | William S. Rosecrans | William S. Sadler |
| William S. Van Dyke | William Sachs | William Sadler |
