| William Codling | William Cohen | William Colby |
| William Coldingham Masters Nicholson | William Coleman | William Collazo |
| William Collier | William Collier (attore 1866) | William Collier (attore 1902) |
| William Collier Jr. | William Collier Sr. | William Collins |
| William Collins Whitney | William Collum | William Coltman |
| William Colton Shires | William Compton | William Compton, I conte di Northampton |
| William Compton, IV marchese di Northampton | William Compton, V marchese di Northampton | William Condon |
| William Congdon | William Congreve | William Congreve (inventore) |
| William Congreve (scrittore) | William Conklin | William Connolly |
| William Connor | William Connor (ginnasta) | William Conrad |
| William Conrad Koch | William Conti | William Cook |
| William Cook Group | William Cooper | William Cordeiro Melo |
| William Corkine | William Cornwallis | William Cornwallis Harris |
| William Cornysh | William Cornysh (1430-1502) | William Cornysh (1465-1523) |
| William Correa | William Cosentini | William Costes |
| William Cotton (inventore) | William Cotton Oswell | William Cottrell |
| William Cottrill | William Courtenay | William Courtenay (arcivescovo) |
| William Courtenay, I conte di Devon | William Courtenay, II conte di Devon | William Courtenay, IX conte di Devon |
| William Courtenay, VII conte di Devon | William Courtenay, VIII conte di Devon | William Coutts Keppel |
| William Coventry, V conte di Coventry | William Cowhig | William Cowper |
| William Cowper (attore) | William Cox | William Cox (atleta) |
| William Craft | William Cragh | William Craig |
| William Craig Moore | William Cranch Bond | William Crapo Durant |
| William Crary Brownell | William Craven | William Craven, I conte di Craven |
| William Craven, II conte di Craven | William Craven, IV conte di Craven | William Craven, VI barone Craven |
| William Crawford Gorgas | William Crawford Williamson | William Criss |
| William Cristopher Handy | William Croft | William Crookes |
| William Crookshanks | William Crothers | William Crowley |
| William Crowninshield Endicott | William Cruickshank | William Culbertson III |
| William Cullen | William Cullen (giudice) | William Cullen Bryant |
| William Cumberland Cruikshank | William Cunningham | William Cunningham (cestista) |
| William Cunningham (economista) | William Cunningham (teologo) | William Cureton |
| William Curry Keller | William Curtis | William Curtis Chase |
| William Cushing | William Cuthbert Faulkner | William Cuthbertson |
| William D'Altri | William D'Amico | William d'Amico |
| William d'Aubigny | William d'Aubigny (Brito) | William d'Aubigny (disambigua) |
| William d'Aubigny (Pincerna) | William d'Aubigny, I conte di Arundel | William d'Aubigny, II conte di Arundel |
| William d'Aubigny, III conte di Arundel | William d'Aubigny, IV conte di Arundel | William D'Avenant |
| William D. Bloxham | William D. Byron | William D. Coolidge |
| William D. Davies | William D. Ford | William D. Foster |
| William D. Hoard | William D. Leahy | William D. Mitchell |
| William D. Moseley | William D. Mounce | William D. Phillips |
| William D. Russell | William D. Taylor | William Da Corean Hatcher |
| William da Silva Barbosa | William Da Silva Barbosa | William Dale Wall |
| William Dalen Clyburn | William Daley | William Dalrymple |
| William Dalton | William Dampier | William Danforth Mulliken |
| William Daniel Frawley | William Daniel Hillis | William Daniel Leahy |
| William Daniel McCafferty | William Daniel Phillips | William Daniel Sanders |
| William Daniels | William Danielsen | William Dar |
| William Darby | William Darling | William Dartmouth |
| William Davenant | William David Charles Carling | William David Christian |
| William David Conn | William David Coolidge | William David Daniels |
| William David Davies | William David Ford | William David Forsyth |
| William David Gould | William David Ivy | William David Johnson |
| William David Lindsay Ride | William David McCalden | William David Ross |
| William David Trimble | William Davidson | William Davies |
| William Davies (sceneggiatore) | William Davies Evans | William Davis |
| William Davis (artista) | William Dawbney Nordhaus | William Dawes |
| William Day | William Dazzani | William de Albini |
| William de Albini IV | William De Amorim | William De Angelis |
| William de Asevedo Furtado | William de Beauchamp | William de Beauchamp, IX conte di Warwick |
| William de Beaumont | William de Beaumont, III conte di Warwick | William de Brailes |
| William de Corbeil | William de la Pole | William de la Pole, I duca di Suffolk |
| William de Moraes | William De Moraes | William de Ros |
| William de Ros, II barone de Ros | William de Saint Calais | William de Saint-Calais |
| William de Soules | William de Ufford | William de Ufford, II conte di Suffolk |
| William de Valence | William de Valence, I conte di Pembroke | William De Vecchis |
| William de Vesci | William de Wiveleslie Abney | William De Wiveleslie Abney |
| William Dean | William Dean Howells | William Dean Johnson |
| William Dean Martin | William Dean Naulls | William DeAndrea |
| William Deane | William Dear | William Decker |
| William Dee Calhoun | William Degouve de Nuncques | William DeHart Hubbard |
| William del Galles | William Delbert Gann | William Dellinger |
| William Demarest | William Dembski | William Demby |
| William DeMeo | William Demko | William Dempster Hoard |
| William Denard Barton | William Denby Hanna | William Denis McBride |
| William Denison | William Denison McKinney | William Dennis King |
| William Dennison | William Dennison (politico) | William Dennison Junior |
| William Dennison Stephens | William Denny and Brothers | William Denny and Brothers Limited |
| William Denton Cox | William DePuy | William Derek Grimm |
| William Derham | William Dervall | William Des Vœux |
| William Desmond | William Desmond Taylor | William Devane |
| William Deverell | William Devereux Byron II | William Devino |
| William deVry | William DeVry | William DeWitt Mitchell |
| William di Cambridge | William di Gloucester | William di Kilkenny |
| William di Malmesbury | William di Rubruck | William di Wykeham |
| William di Wykenham | William di Ypres | William Dickey |
| William Dickson | William Dickson (calciatore 1866) | William Diehl |
| William Dieterle | William Diller Matthew | William Disney |
| William Dobel | William Dobell | William Dobson |
| William Dod | William Dodgin | William Dodgin, Sr. |
| William Dollar | William Donachie | William Donald Borders |
| William Donald Grigg | William Donald Hamilton | William Donald Stewart |
| William Donlon Edwards | William Donn de Burgh | William Donne |
| William Doran | William Dorsey Brown | William Dorsey Pender |
| William Doud Packard | William Douglas | William Douglas Cullen |
| William Douglas de Amorim | William Douglas De Amorim | William Douglas Hamilton |
| William Douglas Home | William Douglas Humia Menezes | William Douglas Mitchell |
| William Douglas the Hardy | William Douglas, duca di Hamilton | William Douglas, I conte di Douglas |
| William Douglas, I duca di Queensberry | William Douglas, I marchese di Douglas | William Douglas, IV baronetto |
