| J | J & P |
| J W J | J. W. J. |
| Jackson | George Jackson |
| Jackson | Jackson & Bellamy Ltd |
| Jackson | Jackson, Stacey & Smith |
| Jackson | S. J. / Spear & Jackson (Ashberry) Ltd |
| Jackson | Wilfred Jackson |
| Jackson | William Henry Jackson |
| Jackson | William Jackson & Company |
| Jacobs | Jacobs & Co |
| James | Frederick Walter (Fred) James |
| James | Henry James & Co |
| James | J. U. James & Sons Ltd |
| Jarvis | James Jarvis |
| Jarvis | Thomas Jarvis |
| Jenkins | Charles E. Jenkins Ltd |
| Jenkins | Edwin Jenkins |
| Jenkins | G. Jenkins |
| Jenkins | Jenkins & Ringrose |
| Jenkins | Jenkins & Timm Ltd |
| Jenkinson | Marshall & Jenkinson |
| Jepson | Matthew & John Jepson |
| Jepson | Turner & Jepson |
| Jervis | John Jervis |
| Jesmond | Pearson & Jesmond |
| Jessop | Jessop & Smith Ltd |
| Jessop | Richard & William Jessop |
| Jewel | Jewel Blade Limited |
| Jewel | Jewel Razor Company Ltd |
| Jewesson | Richard Jewesson & Son |
| Jewitt | William Jewitt |
| Jinkinson | Thomas Jinkinson |
| Johnson | Ann Johnson & Sons |
| Johnson | Christopher Johnson (Cutlers) Ltd |
| Johnson | Edwin Johnson |
| Johnson | George Johnson & Son / Ann Johnson & Sons / George Johnson & Company |
| Johnson | Henry Johnson & Son |
| Johnson | James Johnson |
| Johnson | Johnson, Spencer & Company |
| Johnson | Matthew Johnson |
| Johnson | R. M. Johnson & Company |
| Jollity | Garrison Jollity |
| Jonas | Jonas & Carnall |
| Jones | John Jones & Company |
| Jones | Jones & Longbottom Ltd |
| Jones | Jones Brothers |
| Jones | Joseph Bullous Jones & Company / Jones Brothers |
| Jordan | A. J. Jordan |
| Jordan | Jordan Marsh & Company |
| Jowitt | George Jowitt & Sons Ltd |
| Julian | John Julian |
| Justice | Paris Justice |
| Justice | Thomas Justice & Sons Ltd |
