| William Cockburn | 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 |
