| William Aitken | William Aiton | William Akio |
| William Alan Friedle | William Alan Munson | William Alatalo |
| William Albert Ablett | William Albert Burke | William Albert Dembski |
| William Albert Hajt | William Albert Henry | William Albert Stauffer |
| William Albert Wack | William Albert Ward | William Albright |
| William Albright (compositore) | William Alexander | William Alexander (generale americano) |
| William Alexander (generale statunitense) | William Alexander (generale) | William Alexander (pittore) |
| William Alexander Abbott | William Alexander Anthony Archibald Hamilton, XI duca di Hamilton | William Alexander Campbell |
| William Alexander Chilton | William Alexander Clarke Bustamante | William Alexander Forbes |
| William Alexander Gerhardie | William Alexander Graham | William Alexander Greer |
| William Alexander Louis Stephen Douglas Hamilton | William Alexander McKinlay | William Alexander Smith |
| William Alexander Trapp | William Alexander, I conte di Stirling | William Alfred Fowler |
| William Alfred Goldsworthy | William Alfred Rae Wood | William Ali Floyd |
| William Alison Anders | William Allan | William Alland |
| William Allen | William Allen (cardinale) | William Allen (politico) |
| William Allen Basie | William Allen Butler | William Allen Edwards |
| William Allen Egan | William Allen Horning | William Allen Thornbury |
| William Allen White | William Allen White Cabins | William Alleyne Cecil |
| William Allingham | William Allman | William Almon Wheeler |
| William Alonso | William Aloysius Brady | William Aloysius O'Connor |
| William Alphonso Murrill | William Alston | William Alves |
| William Alves (calciatore 1986) | William Alves (calciatore 1987) | William Alves (calciatore 1991) |
| William Alves de Oliveira | William Alvin Moody | William Alvord |
| William Alwyn | William Amar Keys | William Amaral de Andrade |
| William Ambroise Marçais | William Ambrose Wright | William Amelius Aubrey de Vere Beauclerk |
| William Ames | William Amherst | William Amherst, I conte Amherst |
| William Amine Hawi | William Amor | William Amorim |
| William Amponsah | William and Mary College | William Andelfinger |
| William Anders | William Anderson | William Anderson (ciclista) |
| William Anderson (hockeista su ghiaccio) | William Andre | William Andrew Pataky |
| William Andrewes | William Anin | William Anne Holles Capell |
| William Ansah Sessarakoo | William Anson | William Anthony Blalock |
| William Anthony Foulkes | William Anthony McGuire | William Anthony Morley |
| William Anthony Parker | William Anthony Perry | William Anthony Shinkman |
| William Anthony Toomey | William Antonio Maldonado López | William Antonio Maldonado Lopez |
| William ap Thomas | William Applegarth | William Aquin Carew |
| William Arboleda | William Archer | William Archer (naturalista) |
| William Archer Fullingim | William Archibald | William Archibald Cadell |
| William Archibald Spooner | William Arjona | William Arne Hanssen |
| William Arrol | William Artaud | William Arthur Bonds |
| William Arthur Carr | William Arthur Cummings | William Arthur Davis |
| William Arthur Johnson | William Arthur Klucas | William Arthur Miske |
| William Arthur Moloney | William Arthur Pailes | William Arthur Paxton |
| William Arthur Philip Louis | William Arthur Stanier | William Arthur Stickney |
| William Arthur Ward | William Artino | William Artur de Oliveira |
| William Ascroft | William Ashcroft | William Asher |
| William Asher (regista) | William Asher (sciatore nautico) | William Ashley Bradfield |
| William Ashley Kirby | William Ashman Fraker | William Ashurst |
| William Assandri | William Astbury | William Astor |
| William Astor, I visconte Astor | William Atheling Jr | William Atherton |
| William Atticus Shaffer | William Attrill | William Aubrey Beauclerk |
| William Aucamp | William Auguste Brevoort Coolidge | William Auguste Coolidge |
| William Augustine Whelan | William Augustus Banks III | William Augustus Barstow |
| William Augustus Tilden | William Auld | William Austin |
| William Austin (scrittore) | William Averell Harriman | William Avery |
| William Avery Rockefeller | William Axt | William Ayache |
| William Ayres Ward | William à Court, I barone Heytesbury | William B. Bulloch |
| William B. Davidson | William B. Davis | William B. Eerdmans |
| William B. Eerdmans Publishing Company | William B. Franke | William B. Hazen |
| William B. Helmreich | William B. Lenoir | William B. Mason |
| William B. Rosson | William B. Saxbe | William B. Strong |
| William B. Travis | William Babcock Hazen | William Babell |
| William Backhouse Astor | William Backhouse Astor, Jr. | William Backhouse Astor, Sr. |
| William Baeten | William Baffin | William Bagot |
| William Bagot, I barone Bagot | William Bagot, II barone Bagot | William Bagot, III barone Bagot |
| William Bagwell | William Bailey | William Baines |
| William Baird | William Baird (calciatore 1874) | William Baker |
| William Bakewell | William Bakewell (attore) | William Bakewell (marinaio) |
| William Baldry Tammas | William Baldwin | William Balikwisha |
| William Baliol Brett | William Ball | William Ball (astronomo) |
| William Ballard Hurd | William Ballard Preston | William Ballinger |
| William Balmer | William Barber | William Barbey |
| William Barbio | William Barclay | William Barclay (teologo) |
| William Barclay Masterson | William Barents | William Baring |
| William Baring, II barone Ashburton | William Barker | William Barker (traduttore) |
| William Barlow | William Barlow (mineralogista) | William Barlum Thompson |
| William Barner Lienhard | William Barr | William Barret Travis |
| William Barron Hilton | William Barry Taylor | William Barry Wood |
| William Barstow Strong | William Bart Saxbe | William Barta |
| William Bartley III | William Barton Rogers | William Bartram |
| William Basie | William Basil Percy Feilding | William Basinski |
| William Bassett | William Bassett (attore) | William Bates |
| William Bates Francis | William Bateson | William Bathurst Dove |
| William Batista | William Baumol | William Bayer |
| William Bayle Bernard | William Bayliss | William Baziotes |
| William Bøving | William Beardmore | William Beardmore and Company |
| William Beattie Feathers | William Beattie Ramsay | William Beau Mirchoff |
| William Beauclerk | William Beauclerk, IX duca di St. Albans | William Beauclerk, VIII duca di St. Albans |
| William Beauclerk, X duca di St Albans | William Beauclerk, X duca di St. Albans | William Beaudine |
| William Beaumont | William Beccaro | William Beckett |
| William Beckford | William Beckford di Somerley | William Becklean |
| William Beckman | William Beckmann | William Bedford |
| William Bedwell | William Beebe | William Beechey |
| William Bell | William Bell (cantante) | William Bell (cestista) |
| William Bell (fotografo) | William Bell (personaggio) | William Bell Dinsmoor |
| William Bell Scott | William Bellairs | William Belsham |
| William Bemrose | William Ben Hogan | William Bendix |
| William Benedict Nicholson | William Benjamin Lenoir | William Bennett |
| William Bennett (compositore) | William Bennett (musicista) | William Bennett (politico canadese) |
| William Bennett (politico statunitense 1943) | William Bennett (politico statunitense) | William Bennett (politico) |
