| 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 | William Augustus |
| William Augustus Ayres | William Augustus Blount Branch | William Augustus Croffut |
| William Augustus Darling | William Augustus Hall | William Augustus Lake |
| William Augustus Larned | William Augustus Newell | William Augustus Pullen |
| William Augustus Reeder | William Augustus Tilden | William Augustus Wellman |
| William Augustus West, 3. Earl De La Warr | William Augustus, Duke of Cumberland | William Auld |
| William Austin | William Austin (Filmeditor) | William Austin (Mediziner) |
| William Austin (Schauspieler) | William Austin (Schriftsteller) | William Austin House |
| William Avenya | William Averell Harriman | William Averill Stowell |
| William Avery | William Avery (Basketballspieler) | William Aviolat |
| William Avner Paschal | William Awihilima Kahaiali'i | William Awihilima Kahaialiʻi |
| William Axl Rose | William Axt | William Ayers |
| William Ayerst Ingram | William Ayres | William Ayrton |
| William Ayrton (Dirigent) | William Ayscough | William Aytoun |
| William Azariah Munn | William „Bill“ McGuire Bryson | William „Count“ Basie |
| William „Pop“ Gates | William Ætheling | William à Court |
| William à Court, 1. Baron Heytesbury | William à Court, 1. Baronet | William B. Allison |
| William B. Anderson | William B. Atwood | William B. Bankhead |
| William B. Bankhead National Forest | William B. Bate | William B. Benton |
| William B. Bowling | William B. Brierley | William B. Buffum |
| William B. Caldwell | William B. Caldwell III | William B. Caldwell IV |
| William B. Calhoun | William B. Campbell | William B. Charles |
| William B. Clark | William B. Coley | William B. Coley Award |
| William B. Coley Award for Distinguished Research in Basic and Tumor Immunology | William B. Cooper | William B. Craig |
| William B. Cravens | William B. Davidson | William B. Davis |
| William B. Davis (Zoologe) | William B. Dinsmoor | William B. Eerdmans Publishing Company |
| William B. Francis | William B. Franke | William B. Franklin |
| William B. Friend | William B. Graham Prize for Health Services Research | William B. Greenough |
| William B. Greenough III | William B. Guggenheim | William B. Harris |
| William B. Hartwell | William B. Hawks | William B. Heilig Field |
| William B. Helmreich | William B. Horton | William B. Houchens |
| William B. Ide | William B. Jensen | William B. Johnson |
| William B. Johnson (Mathematiker) | William B. Jordan | William B. Kannel |
| William B. Kaplan | William B. Kean | William B. Kouwenhoven |
| William B. Lenoir | William B. Lewis | William B. Maclay |
| William B. Macomber | William B. Macomber junior | William B. Magruder |
| William B. McInnes | William B. McKinley | William B. Mitchell |
| William B. Morris | William B. Muchmore | William B. Munro |
| William B. Murphy | William B. N. Berry | William B. Pine |
| William B. Preston | William B. Pryer | William B. Read |
| William B. Richardson | William B. Rochester | William B. Ross |
| William B. Rosson | William B. Saxbe | William B. Scott |
| William B. Shattuc | William B. Shockley | William B. Small |
| William B. Smith | William B. Spencer | William B. Spong |
| William B. Strong | William B. Taylor junior | William B. Travis |
| William B. Umstead | William B. Washburn | William B. Widnall |
| William B. Williams | William B. Wilson | William Babcock |
| William Babcock Hazen | William Babington | William Bach |
| William Bach, Baron Bach | William Backhouse | William Backhouse Astor |
| William Backhouse Astor junior | William Backhouse Astor senior | William Backhouse Astor, Jr. |
| William Backhouse Astor, Sr | William Bacon | William Bacon Oliver |
| William Bacon Wright | William Bade | William Badger |
| William Baer | William Baffin | William Baikie |
| William Bailey | William Bailey Lamar | William Bainbridge |
| William Baird | William Baird (Zoologe) | William Baker |
| William Baker (Politiker) | William Bakewell | William Balck |
| William Baldé | William Balde | William Baldwin |
| William Balfour Baikie | William Balikwisha | William Ball |
| William Ball (Astronom) | William Ball (Fußballspieler) | William Ball (Politiker) |
| William Ballard Preston | William Bambridge | William Banting |
| William Barak | William Barber Tyler | William Barbour |
| William Barbour Agnew | William Barclay | William Barclay (Theologe) |
| William Barclay Charles | William Barclay Masterson | William Barclay McMurrich |
| William Barclay Peat | William Bardeen | William Bardolf |
| William Barents | William Baring | William Baring (Maler) |
| William Baring (Mediziner) | William Baring, 2. Baron Ashburton | William Barker |
| William Barksdale | William Barlas | William Barlow |
| William Barlow (Bischof von Chichester) | William Barlow (Geologe) | William Barnard |
| William Barnes | William Barnes (Dichter) | William Barnes (Richter) |
| William Barnes (Sportschütze) | William Barnes Steveni | William Barnetson, Baron Barnetson |
| William Barnett | William Barr | William Barret Travis |
