| Cabana | Cabana |
| Cadman | Cadman & Sons |
| Cadman | Cadman, Son & Broadhurst |
| Cadman | David Cadman |
| Cadman | Edwin Cadman |
| Cadman | Ellis & Cadman |
| Cadman | George & Heaton Cadman |
| Cadman | George Cadman |
| Cadman | John Cadman |
| Cadman | Peter Cadman & Sons |
| Cadman | Peter Cadman, Son & Smith |
| Cadman | Roberts, Cadman & Company |
| Cadman | Thomas R. Cadman & Sons Ltd |
| Calow | Charles Calow |
| Cam | Cam & Birks |
| Cam | James Cam & Company |
| Cam | Joseph Cam |
| Cambridge | Cambridge Cutlery & Tool Company |
| Cantrell | Charles Cantrell |
| Cantrell | Edward A. Cantrell & Sons |
| Cantrell | George A. Cantrell & Son |
| Cantrell | Joseph Cantrell & Sons |
| Cantrell | William Cantrell & Sons |
| Canty | H. T. Canty & Company |
| Capps | John R. Capps |
| Carlisle | Carlisle Brothers Ltd |
| Carlisle | W. H. Carlisle & Sons / F. J. Carlisle |
| Carlisle | William Carlisle |
| Carnall | Carnall & Wyatt |
| Carnall | Jonas & Carnall |
| Carr | Bishop, Carr & Company |
| Carr | C. F. Carr |
| Carr | Carr, Wild & Co Ltd |
| Carr | Carrs of Sheffield (Manufacturing) Ltd |
| Carr | Henry S. Carr & Son Ltd |
| Carr | John Carr |
| Carr | Rowland Carr |
| Carr | T. Carr |
| Carrick | Carrick |
| Casson | James Casson & Sons |
| Casson | Thomas Casson |
| Castiglioni | J. L. Castiglioni |
| Caterers | The Caterers Supply Ltd |
| Cattell | Baines, Cattell & Company Ltd |
| Cawton | Joshua Cawton |
| Cawton | Thomas Cawton |
| Celnik | Celnik & Power Ltd |
| Challenge | Challenge Cutlery Company |
| Champion | Champion (Scissors) Ltd |
| Chapman | Chapman, Wall & Co Ltd |
| Chapman | Drew & Chapman |
| Chapman | Edward Leslie Chapman |
| Chapman | Thomas Chapman and Son |
| Chapman | William Chapman |
| Charlesworth | George Charlesworth |
| Charlton | William Charlton |
| Chatterley | John B. Chatterley & Sons Ltd |
| Cheesman | E. W. Cheesman & Company |
| Cheetham | Jack Cheetham |
| Cheetham | Thomas Cheetham |
| Cheetham | Wm. Cheetham & Sons |
| Chester | Chester Brothers |
| Chesterman | James Chesterman & Company Ltd |
| Chimo | Chimo Holdings |
| Christie | James Christie & Sons Ltd |
| Cie | Mexeur & Cie |
| Clair | George E. St Clair |
| Clarbour | Clarbour & Hancock |
| Clark | Clark & Brown |
| Clark | Clark & Company (Sheffield) Ltd |
| Clark | Clark & Hall / Clark & Osborn |
| Clark | Clark & Todd |
| Clark | Clark, Hardwick & Co |
| Clark | Clark, Marsh & Company |
| Clark | George Clark (Sheffield) Ltd |
| Clark | The Alexander Clark Company Ltd |
| Clarke | Clarke, Shirley & Co |
| Clarke | Crookes & Clarke |
| Clarke | Harry Clarke |
| Clarke | John Arthur Clarke |
| Clarke | John Clarke & Son Ltd |
| Clarke | Walter Clarke |
| Classic | Classic Cutlery (Sheffield) Ltd |
| Clayton | George Clayton & Company |
| Clayton | Graham Clayton |
| Clayton | Swinden Clayton |
| Clegg | Henry Clegg & Sons |
| Clintock | The Clintock Plate Co |
| Close | Joseph Close |
| Clough | Parkin, Parker, Clough & Potts |
| Cluley | Francis Cluley |
| Co-operative | Sheffield Cutlery Co-operative Productive Society |
| Cobb | Frank Cobb & Company Ltd |
| Cockbill | Ernest C. Cockbill |
| Cocker | Addy & Cocker |
| Cocker | Steven Cocker |
| Cocker | W. L. Cocker & Sons (Sheffield) Ltd |
| Cockhill | John C. Cockhill |
| Coe | James Coe & Sons |
| Coe | John Coe |
| Coe | John Coe & Company |
| Coldwell | Froggatt, Coldwell & Lean |
| Cole | Ambler, Price & Cole (Amprico) |
| Colgrave | Buxton & Colgrave |
| Colgrave | Thomas Colgrave & Son |
| Colley | Alice Colley & Son |
| Colley | Colley & Company / Hall & Colley |
| Colley | Colley Brothers |
| Colley | Emmanuel Colley |
| Colley | George Colley |
| Colley | Hall & Colley |
| Colley | Lees & Colley Ltd |
| Colley | Oates, Colley & Wigham / Oates & Colley |
| Colley | Sharrow, Colley & Company |
| Colley | Thomas and Joseph Colley |
| Colley | Thomas Colley / Colley & Hargreaves |
| Colley | W. A. Colley Ltd |
| Colley | William Colley & Son / Brothers |
| Collings | Collings & Wallis |
| Collingwood | Collingwood & Son |
| Collins | Collins & Co |
| Colquhoun | Colquhoun & Cadman Ltd |
| Colver | Frank B. Colver |
| Comet | Comet Cutlery Company |
| Congreve | Charles Congreve |
| Constantine | Richard Constantine |
| Constantine | Stephen Constantine |
| Continental | Continental Cutlery Company |
| Cook | James and Joseph Cook |
| Cooke | C. F. Cooke Son & Co |
| Cooke | Ryalls & Cooke |
| Cooke | Saynor, Cooke & Ridal |
| Cooley | William Cooley |
| Cooper | Cooper & Sons (Sheffield) Ltd |
| Cooper | Cooper Brothers & Sons Ltd |
| Cooper | Cooper Ludlam (Sheffield) Ltd |
| Cooper | John Cooper & Son Ltd |
| Cooper | Mottram, Cooper & Company |
| Cooper | Reg Cooper |
| Cooper | Wilfred Cooper |
| Cooper | William Cooper (Hand Tools) Ltd |
| Coote | Angus & Coote |
| Copley | Copley & Company Ltd |
| Copley | Henry Copley |
| Copley | John Copley & Sons |
| Cork | Thomas W. Cork & Son Ltd |
| Corker | John Corker |
| Corona | Corona |
| Corsan | Corsan, Denton, Burdekin & Company |
| Cotterill | Cotterill & Co. Ltd |
| Couch | Thomas Couch |
| Coulson | Jukes Coulson & Company / Jukes Coulson, Stokes & Company |
| Coulson | Samuel Coulson & Company |
| Cousins | Cousins and Smith |
| Cousins | Joseph Cousins & Sons |
| Cowen | Cowen |
| Cowen | James Cowen & Sons |
| Cowley | Joseph Cowley |
| Cowlishaw | J. Y. Cowlishaw Ltd |
| Cowlishaw | Richard Cowlishaw |
| Crapper | Norman Crapper & Company Ltd |
| Craven | Albert Craven |
| Crawshaw | James Crawshaw |
| Creake | Hammond, Creake & Company Ltd |
| Creswick | Creswick & Company |
| Creswick | George Creswick |
| Creswick | Smiths, Knowles, Creswick & Company |
| Creswick | T. J. & N. Creswick / Creswick & Company |
| Creswick | Thomas John Creswick & Company |
| Croft | Croft Cutlery Forging Company Ltd |
| Croft | George Croft |
| Crookes | Brookes & Crookes Ltd |
| Crookes | Crookes & Clarke |
| Crookes | Crookes & Slater |
| Crookes | Crookes Brothers |
| Crookes | George Crookes & Co |
| Crookes | Henry Crookes & Company Ltd |
| Crookes | John Crookes |
| Crookes | Jonathan Crookes & Son |
| Crookes | Lee & Crookes Ltd |
| Crookes | Leonard Crookes (Crookes & Line) |
| Crookes | Obadiah Crookes |
| Crookes | Samuel Crookes |
| Crookes | William Crookes |
| Crossland | John Crossland |
| Crossland | John Crossland & Sons / Crossland Brothers |
| Crossland | Joseph Crossland |
| Crossley | Ellis Crossley & Co |
| Crown | The Crown Manufacturing Company (Leeds) Ltd |
| Crownshaw | W. S. Crownshaw |
| Crowther | Crowther & Wilson |
| Crusade | Crusade (Cutlery) Ltd |
| Cryer | George Cryer |
| Crysteel | Crysteel |
| Culf | Arthur Culf & Company |
| Culf | Culf & Kay (Sheffield) Ltd |
| Cuthbert | Cuthbert & Gregory |
| Cutler | Hiram Cutler, Son, & Chambers |
| Cutler | John Edward Cutler |
| Cutlery | Cutlery Forgers (Sheffield) Ltd |
| Cutlery | Cutlery Forgers Ltd |
| Cutlery | Sheffield Cutlery Supply Company |
| Cutts | Ashforth, Cutts & Anderton |
| Cutts | Charles Cutts |
| Cutts | Cutts Brothers |
| Cutts | George Cutts & Sons |
| Cutts | I. P. Cutts, Sutton & Sons |
| Cutts | Joseph Cutts |
| CWS | Sheffield Cutlery Co-operative Productive Society |
