| L. B. B. | L. B. B. |
| L. M. H. | L. M. H. Manufacturing Company |
| Laidlaw | Whiteaway, Laidlaw & Co Ltd |
| Lamb | Bob Lamb |
| Lamb | Robinson, Lamb & Arundel |
| Lamb | Ryalls & Lamb |
| Lambert | Arthur Lambert |
| Lambert | Lambert & Blaber Ltd |
| Land | Henry Land & Company / T. Land & Son Ltd |
| Langdon | Bunting, Langdon & Company Ltd |
| Lanson | J. A. Lanson & Sons Ltd |
| Larder | Larder & Burgess Ltd |
| Larder | T. Larder & Son |
| Larom | Larom & Burgon |
| Lascelles | Lascelles |
| Latham | George Latham & Sons |
| Latham | Latham & Owen Ltd |
| Latham | T. C. Latham |
| Latham | Walter Latham & Son |
| Laver | John H. Laver |
| Law | Job Stevenson / Stevenson & Law |
| Law | John Law & Sons / John Law & Company |
| Law | Joseph Law |
| Law | Law, Atkin & Oxley |
| Law | Thomas Law & Company |
| Lawrence | George H. Lawrence Ltd |
| Lawson | Henry Lawson & Company |
| Lawton | Joseph Lawton & Company |
| Lawton | Samuel Lawton |
| Leader | Tudor & Leader |
| Leah | Henry Leah & Sons Ltd |
| Lean | Froggatt, Coldwell & Lean |
| Leclere | Henri and Eugene Leclere |
| Ledger | Charles Ledger |
| Ledger | Froggatt & Ledger Ltd |
| Lee | George Lee & Company |
| Lee | George Shadford Lee |
| Lee | Henry Lee & Co / Lee & Middleton |
| Lee | James Lee & Company |
| Lee | Joseph Lee & Company |
| Lee | Lawrence Henry Lee |
| Lee | Lee & Crookes Ltd |
| Lee | Lee & Wigfull (Sheffield) Ltd |
| Leek | James Leek |
| Lees | Lees & Colley Ltd |
| Lees | Paul Lees & Sons |
| Legacy | Legacy Silverware |
| Leggett | Danks & Leggett Ltd |
| Leon | Abraham Leon |
| Leppington | Leppington (Cutlers) Ltd |
| Leroyd | Samuel Leroyd |
| Leslie | Charles Leslie & Co |
| Lesmah | Lesmah |
| Levesley | Levesley Brothers |
| Levick | Abraham Levick |
| Levick | Ann Levick & Company |
| Levick | Charles S. Levick & Company |
| Levick | James Levick & Company |
| Levick | Joseph Levick & Son / Levick Brothers |
| Levick | Theaker, Son & Levick |
| Lewis | Lewis |
| Lewis | Lewis, Rose & Company Ltd |
| Lickorish | Lickorish & Co |
| Lilleyman | Thomas G. Lilleyman |
| Lindley | Alfred Lindley |
| Lindley | William Lindley & Son |
| Line | Leonard Crookes (Crookes & Line) |
| Lingard | Charles Lingard & Sons |
| Lingard | John Lingard |
| Lingard | Robert Lingard |
| Linley | Arthur Linley & Company |
| Linley | Hartley, Linley & Company |
| Linley | James Linley |
| Linley | John Linley |
| Linley | Linley & Watson |
| Linley | Parker & Linley |
| Linley | Thomas Linley |
| Lion | Daniel & Lion |
| Lister | Lister & Knowles |
| Lister | Stanley, Lister & Kay |
| Lister | William Lister, Son & Company |
| Littlewood | C. W. Littlewood |
| Lloyd | E Lloyd & Son |
| Lloyd | Lloyd & Martin |
| Lockhart | Lockhart Equipment Ltd |
| Lockwood | Lockwood Brothers Ltd |
| Lodge | James Lodge Ltd |
| Lomas | Joseph Lomas |
| London | London & Sheffield Cutlery Company Ltd |
| Long | H. G. Long & Company Ltd |
| Long | Long Brothers (Clothing) Ltd |
| Long | Long, Son, & Hawksley |
| Long | Wragg, Long & Company |
| Longbottom | Jones & Longbottom Ltd |
| Longden | J. H. Longden & Sons |
| Longden | Longden & Brown |
| Longden | Longden, Binney & Company |
| Longley | Ellis Longley |
| Longley | Longley & Hawksworth |
| Longley | Longley Brothers |
| Lord | Lord & Harvey |
| Lovett | Walsh, Lovett & Company Ltd |
| Lowcock | Lowcock |
| Lowe | Francis Lowe & Sons |
| Lowe | Hardy, Lowe & Company |
| Lowe | James Lowe & Sons |
| Lowe | John Herbert ‘Sandy’ Lowe |
| Lowe | Lowe Brothers (Cutlers) |
| Lowe | Marsden & Lowe |
| Lowe | Richard Lowe |
| Loy | Elisha Loy |
| Loy | Jonathan Loy |
| Loy | Nicholson & Loy |
| Loy | Richard Loy |
| Loy | William Loy |
| Loy | William Loy & Company |
| Lozano | Eisenberg-Lozano Inc. |
| Ludlam | Cooper Ludlam (Sheffield) Ltd |
| Ludlam | F. Ludlam & Son |
| Ludlam | Fred Ludlam |
| Ludlam | Hannah Ludlam & Son |
| Ludlam | Joseph Ludlam / Elizabeth Ludlam & Sons |
| Lyons | Thos Lyons |
