| William Livingston | William Lloyd | William Lloyd (attore) |
| William Lloyd Garrison | William Lloyd Warner | William Lloyd Webber |
| William Lobb | William Lockhart Clayton | William Lockwood |
| William Lombardy | William Longstreth Dodge | William Lopez (Marvel Cinematic Universe) |
| William Loud Bendigo International | William Loud Bendigo International 2 2013 | William Loud Bendigo International 2 2013 - Doppio |
| William Loud Bendigo International 2 2013 - Singolare | William Loud Bendigo International 2011 | William Loud Bendigo International 2011 - Doppio femminile |
| William Loud Bendigo International 2011 - Singolare femminile | William Loud Bendigo International 2012 | William Loud Bendigo International 2012 - Doppio femminile |
| William Loud Bendigo International 2012 - Singolare femminile | William Loud Bendigo International 2013 | William Loud Bendigo International 2013 - Doppio |
| William Loud Bendigo International 2013 - Singolare | William Louis DeAndrea | William Louis Petersen |
| William Louis Reteneller | William Louis Sharp | William Louis Stricker |
| William Louis Wallace | William Lovett | William Lowther, II baronetto |
| William Lubtchansky | William Luckey | William Lucking |
| William Ludwig | William Lundigan | William Lundin |
| William Lustig | William Luther Hill | William Lutley Sclater |
| William Lygon | William Lygon Pakenham | William Lygon, VII conte Beauchamp |
| William Lyman | William Lynch | William Lyne |
| William Lyne Wilson | William Lyon | William Lyon Mackenzie |
| William Lyon Mackenzie King | William Lyons | William Lyttelton |
| William Lyttelton, III barone Lyttelton | William M. Anderson | William M. Branham |
| William M. Burton | William M. Daley | William M. Evarts |
| William M. Fechteler | William M. Gray | William M. Hoffman |
| William M. Jennings Trophy | William M. Mann | William M. Marston |
| William M. Meredith | William M. Nicholson | William M. Ramsay |
| William M. Tuck | William M. Tweed | William M. Wheeler |
| William Mac Guckin de Slane | William MacAskill | William MacCormac |
| William MacCormick | William MacDougal | William MacFadyen |
| William MacGillivray | William Machado de Oliveira | William Mackay |
| William MacKenzie | William Mackenzie | William MacKinnon |
| William Maclay | William MacMillan | William Macy |
| William Maddock Bayliss | William Magarity | William Magear Tweed |
| William Maher | William Mahony | William Mahony O'Brien |
| William Makepeace Thackeray | William Malcolm Dickey | William Maldonado |
| William Malet | William Malone | William Mang |
| William Mangion | William Mansfield Clark | William Manson |
| William Mapother | William Maragh | William Marçais |
| William Marbury | William Marcais | William March |
| William March (sollevatore) | William Marcus Henderson Rose | William Marcus Paul Stewart |
| William Marcy | William Marion Hougland | William Mark Fagerbakke |
| William Mark Price | William Mark Tosheff | William Markowitz |
| William Marks | William Marlow | William Marolt |
| William Marrion Branham | William Marsfeld | William Marshall |
| William Marshall (attore 1917) | William Marshall (attore) | William Marshall (cantante) |
| William Marshall (direttore della fotografia) | William Marshall (tennista) | William Marshall (zoologo) |
| William Marshall Cazalet | William Marshall Rogers III | William Martínez |
| William Martin | William Martin (calciatore) | William Martin (disambigua) |
| William Martin (naturalista) | William Martin (pallanuotista) | William Martin (velista) |
| William Martin Chamberlain | William Martin Conway | William Martin Gulager |
| William Martin Hunt | William Martin Joel | William Martin Leake |
| William Martin Morris | William Martin Walker | William Martinez |
| William Marvin | William Mason Furrer | William Massey |
| William Masters | William Masters e Virginia Johnson | William Masters et Virginia Johnson |
| William Matheus | William Mathews | William Mathisen |
| William Matteuzzi | William Matthew Cavenaugh | William Matthew Flinders Petrie |
| William Maudit | William Maudit, VIII conte di Warwick | William Mauldin Hopkins |
| William Maurice Cowan | William Max Aitken | William Maximoff |
| William Maxwell | William Maxwell (scrittore) | William Maxwell Evarts |
| William Maxwell, V conte di Nithsdale | William May | William Mayer Flett |
| William Mayes Michaels | William Maynard | William Maze |
| William Méndez | William Mc Pherson | William McArthur |
| William McCabe | William McCadney | William McCahan |
| William McChesney Martin | William McChesney Martin, Jr | William McChesney Martin, Jr. |
| William McClellan Thornberry | William McCool | William McCrum |
| William McDonald | William McDonald (cestista) | William McDonald (politico) |
| William McDonald (vescovo) | William McDonald Wheeler | William McDonough |
| William McDougall | William McDowell-White | William McGann |
| William McGarvey Dudley | William McGill Kenville | William McGonagall |
| William McGregor | William McGregor Paxton | William McGuire Bryson |
| William McIlvanney | William McInnes | William McIntosh |
| William McIntosh (calciatore 1879-1973) | William McKell | William McKie |
| William McKinley | William McLachlan (pattinatore) | William McMahon |
| William McMaster Murdoch | William McMichael Shepherd | William McMillan |
| William McNamara | William McPherson Allen | William Meade Fishback |
| William Meade Lindsley Fiske | William Melling | William Mellor |
| William Melvin "Bill" Hicks | William Melvin Hicks | William Mendieta |
| William Menzies | William Meredith | William Meredith (poeta) |
| William Merle Laughlin | William Merriam | William Merriam Burton |
| William Merritt Chase | William Mervin McKinney | William Mervin Mills |
| William Merwin | William Merz | William Metzger |
| William Meyers | William Meynard | William Mezzanotte |
| William Michael Albert Broads | William Michael Curley | William Michael Daley |
| William Michael Harnett | William Michael Joensen | William Michael Masser |
| William Michael Morgan | William Michael Mulvey | William Michael Petrolle |
| William Michael Phillips | William Michael Rossetti | William Michael Varley |
| William Michael Wilds | William Michael Zabka | William Michaels |
| William Mikelbrencis | William Milbourne James | William Milbourne James (ammiraglio) |
| William Miles Dunn | William Miller | William Miller (attore) |
| William Miller (predicatore) | William Miller (storico) | William Milligan Sloane |
| William Mills Irwin | William Millton | William Milton |
| William Milton Breakenridge | William Mitchell | William Mitchell (economista) |
| William Mitchell Ramsay | William Moerner | William Moir |
| William Mokoena | William Moloney | William Molyneux |
| William Monahan | William Mong | William Montacute |
| William Montacute, I conte di Salisbury | William Montacute, II conte di Salisbury | William Montagu |
| William Montagu Douglas Scott, VI duca di Buccleuch | William Montagu, V duca di Manchester | William Montagu, VII duca di Manchester |
| William Montgomery Watt | William Moody | William Moore |
| William Moore (atleta) | William Moore (ciclista) | William Moore (ufologo) |
| William Morais | William Moreton | William Morgan |
| William Morgan (assicuratore) | William Morgan (educatore) | William Morgan (generale) |
| William Morgan (montatore) | William Morgan (regista) | William Morgan (vescovo) |
| William Morgan Cassidy | William Morganfield | William Morris |
