| William Addams | William Addison | William Addison (Schachspieler) |
| William Addison Duncan | William Addison Phillips | William Addison, 4. Viscount Addison |
| William Adelin | William Adkins | William Adolf Ludwig Marshall |
| William Adolph von Hassell | William Adolphe Bougereau | William Adolphe Bouguereau |
| William Aetheling | William Agee | William Agnew |
| William Ahlefeldt-Laurvig | William Ahlemeyer | William Aiken |
| William Aiken Walker | William Ailes House | William Airmyn |
| William Aitken | William Aiton | William Akers Bassett |
| William Alain André Gabriel Saliba | William Alan Fetter | William Alan Kornhauser |
| William Alan Shatner | William Alanson Bryan | William Alanson Howard |
| William Alanson White Institute | William Albert | William Albert Ackman |
| William Albert Burke | William Albert Catterall | William Albert Dembski |
| William Albert Henry | William Albert Hiltner | William Albert Hugh Rushton |
| William Albert Nitze | William Albert Noyes | William Albert Noyes junior |
| William Albin Young | William Alcott | William Alden Smith |
| William Aldrich | William Aldrich (Politiker) | William Alex Foxen |
| William Alexander | William Alexander (Maler, 1767) | William Alexander (Maler, 1915) |
| William Alexander (Politiker, 1874) | William Alexander Abbott | William Alexander Adams |
| William Alexander Berry | William Alexander Calderhead | William Alexander Craigie |
| William Alexander Cunningham | William Alexander Dickson | William Alexander Forbes |
| William Alexander Foxen | William Alexander Gambling | William Alexander Graham |
| William Alexander Hammond | William Alexander Harris | William Alexander Henry |
| William Alexander Hunter | William Alexander Julian | William Alexander Levy |
| William Alexander MacCorkle | William Alexander Massey | William Alexander Morgan Ruderth |
| William Alexander Richardson | William Alexander Smith | William Alexander Werbeniuk |
| William Alexander Wilkens | William Alexander, Baron Alexander of Potterhill | William Alexander, Lord Stirling |
| William Alfred Buckingham | William Alfred Cook | William Alfred Eddy |
| William Alfred Fowler | William Alfred Passavant | William Alington |
| William Alington (Begriffsklärung) | William Alison Anders | William Allain |
| William Allan | William Allan Award | William Allan Bardeen |
| William Allan Carroll | William Allan Memorial Award | William Allan Oldfield |
| William Alland | William Allardyce | William Allaudin Mathieu |
| William Allen | William Allen (Kardinal) | William Allen (Politiker, 1803) |
| William Allen (Politiker, 1827) | William Allen (Quäker) | William Allen (Segler) |
| William Allen Alsop | William Allen Brock | William Allen Casselman |
| William Allen Eaton | William Allen Egan | William Allen Harbinson |
| William Allen Horning | William Allen Miller | William Allen Northcott |
| William Allen Robertson | William Allen Schreyer | William Allen Sipe |
| William Allen Spencer | William Allen Sturge | William Allen Trimble |
| William Allen White | William Allen Young | William Allen Zajc |
| William Allingham | William Allison | William Allison House |
| William Allmond Codrington Goode | William Almon Wheeler | William Almy Pirce |
| William Alonso | William Alonzo 'Cat' Anderson | William Alonzo Anderson |
| William Aloys Klemperer | William Aloysius Griffin | William Aloysius O'Connor |
| William Aloysius O’Connor | William Aloysius Scully | William Alphonso Murrill |
| William Alston | William Alvara Humphrey | William Alves de Oliveira |
| William Alvin Clemens | William Alvin Howard | William Alvin Moody |
| William Alvin Pittenger | William Alwyn | William Amaral de Andrade |
| William Ambrose Spicer | William Ambrose Wright | William Ambrosia Cowley |
| William Ames | William Amherst | William Amherst (General) |
| William Amherst, 1. Earl Amherst | William Amorim | William Amos |
| William Amos Poynter | William Amove Avenya | William and Blanche Brooks House |
| William and Flora Hewlett Foundation | William and Mary College | William and Mary Quarterly |
| William and Noma Copley Foundation | William Anders | William Anders (Astronaut) |
| William Anders (Politiker) | William Anderson | William Anderson (Cricketspieler) |
| William Anderson (Eishockeyspieler) | William Anderson (Ingenieur) | William Anderson (Kunsthistoriker) |
| William Anderson (Leichtathlet) | William Anderson (Marineoffizier) | William Anderson (Mediziner) |
| William Anderson (Politiker, 1762) | William Anderson (Politikwissenschaftler) | William Anderson (Theaterleiter) |
| William Anderson Handley | William Anderson Pile | William Andre |
| William Andreas Trenckmann | William Andrew | William Andrew Cecil Bennett |
| William Andrew Enemark | William Andrew Goddard | William Andrew Lamoreaux |
| William Andrew MacKay | William Andrew Michael Junior Nylander Altelius | William Andrew O'Neil |
| William Andrew O’Neil | William Andrew Publishing | William Andrew Wallace |
| William Andrews | William Andrews (Footballspieler) | William Andrews Clark |
| William Andrews McDonough | William Andrews Nesfield | William Andrus Alcott |
| William Angel | William Ansah Sessakaroo | William Ansah Sessarakoo |
| William Anstruther-Gray, Baron Kilmany | William Anthony Derlago | William Anthony Gamson |
| William Anthony Hughes | William Anthony Johnson | William Anthony McGuire |
| William Anthony Oefelein | William Anthony Parker White | William Anthony Shinkman |
| William Anthony Younger | William ap Thomas | William Applegarth |
| William Appleman Williams | William Appleton | William Aquin Carew |
| William Archer | William Archer (Kritiker) | William Archerd |
| William Archibald Dunning | William Archibald Irwin | William Archibald Spooner |
| William Arden | William Arden, 2. Baron Alvanley | William Arkell |
| William Armisted Burwell | William Arms Fisher | William Armson |
| William Armstrong | William Armstrong (Politiker) | William Armstrong Percy |
| William Armstrong, 1. Baron Armstrong | William Armstrong, Baron Armstrong of Sanderstead | William Arnold |
| William Arnold Anthony | William Arnold Carter | William Arnold Peters |
| William Arntz | William Arrow | William Arrowsmith |
| William Arthur Beiderlinden | William Arthur Bone | William Arthur Carr |
| William Arthur Harland | William Arthur Johnson | William Arthur Knight |
| William Arthur Lewis | William Arthur McKeighan | William Arthur Miske |
| William Arthur Pailes | William Arthur Parks | William Arthur Petri |
| William Arthur Philip Louis Mountbatten-Windsor | William Arthur Purtell | William Arthur Satchell |
| William Arthur Smeaton | William Arthur Smith Benson | William Arthur Stanier |
| William Arthur Torrey | William Arthur Weasley | William Arthur Winstead |
| William Artur de Oliveira | William Arundel | William Arundel Orchard |
| William Arveson | William Asa Hutchinson | William Asbury |
| William Ashe | William Ashford (Politiker) | William Ashley |
| William Ashley Bradfield | William Ashley Sunday | William Ashmole |
| William Ashurst | William Aspray | William Astbury |
| William Aston | William Astor | William Astor, 4. Viscount Astor |
| William Atchison O'Neill | William Atchison O’Neill | William Atheling |
| William Atheling Jr. Award | William Atherton | William Atkinson |
| William Atkinson & Sons | William Atkinson Jones | William Attaway |
| William Attewell | William Attia | William Attrill |
| William Aubrey | William Aucoin | William August Brevoort Coolidge |
| William August Fisher | William August Kobbé | William August Marburg |
| William August Rodenberg | William August Shade | William Augustao Mgimwa |
| William Auguste Foley | William Augustine Hickey | William Augustine Williams |
