| Tagg | Charles Tagg / William Tagg |
| Tankard | William Tankard |
| Tate | Smith, Tate, Hoult & Tate |
| Tay | William Tay & Sons (Sheffield) Ltd |
| Taylor | Addy, Brownill & Taylor |
| Taylor | Buckley & Taylor Ltd |
| Taylor | George Taylor |
| Taylor | H. H. Taylor Cutlery Company Ltd |
| Taylor | James Taylor |
| Taylor | James Taylor Jnr |
| Taylor | John Taylor & Co, London |
| Taylor | M. Taylor |
| Taylor | Taylor Brothers Cutlery Company Ltd |
| Taylor | Taylor Sawtell Ltd |
| Taylor | Taylor's Eye Witness |
| Taylor | Taylor, Parkin & Company |
| Taylor | Timothy Whites & Taylors Ltd |
| Teal | William Teal |
| telegraph | The Weekly Telegraph |
| Temporal | Thomas Temporal |
| Temporal | William Temporal Ltd |
| Terry | Edwin Terry (Sheffield) Ltd |
| Terry | W. Terry & Son |
| Tetley | R. F. Tetley |
| Thackray | John Thackray |
| Thames | Thames |
| Theaker | Theaker, Son & Levick |
| Thickett | John Thickett |
| Thomas | A. Thomas & Co |
| Thomas | B. Thomas & Co |
| Thomas | Broomhead & Thomas |
| Thomas | John Thomas & Company |
| Thomas | Lewis Thomas |
| Thompson | A. E. Thompson & Son |
| Thompson | E. L. Thompson & Company |
| Thompson | H. Thompson, Dublin |
| Thompson | J. H. Thompson (Cutlery) Ltd |
| Thompson | James Thompson |
| Thompson | Joseph Thompson |
| Thompson | Robert Thompson |
| Thompson | T. G. Thompson |
| Thompson | Thompson & Barber / Thompson & Son |
| Thompson | Thompson & Fletcher |
| Thorneloe | Thorneloe & Co |
| Thornhill | John Bednal & Company / Thornhill, Bednal & Company Ltd |
| Thornhill | W. Thornhill & Company |
| Thornton | George William Thornton Ltd |
| Thorpe | John Thorpe |
| Thorpe | Joseph Thorpe |
| Thorpe | Thomas Thorpe |
| Thorpe | Thorpe & Winter |
| Thorpe | Thorpe, Wragg & Company |
| Tibbit | Joseph Tibbit |
| Tillotson | Thomas Tillotson & Company |
| Timbrell | Henry Timbrell & Company |
| Timm | Frederick Ellis Timm & Company |
| Timm | Jenkins & Timm Ltd |
| Timm | Roberts & Timm |
| Tivey | Hawksworth & Tivey |
| Todd | Clark & Todd |
| Tofield | Alfred Tofield & Company |
| Tolputt | H. Tolputt & Company Ltd |
| Tompkin | Brown & Tompkin |
| Tompkin | Oakes, Tompkin & Ward |
| Tompson | Thomas Tompson |
| Tool | Sheffield Scissors, Razor & Tool Company Ltd |
| Toothill | Henry Toothill |
| Toothill | Robert Toothill |
| Topaz | Topaz Tools |
| Tordoff | J. Tordoff |
| Torrey | J. R. Torrey Razor Company |
| Towndrow | Towndrow Brothers |
| Townend | George Robert Townend |
| Townroe | John Townroe & Sons Ltd |
| Townsend | Francis Townsend |
| Toy | John W. Toy Ltd |
| Travis | Nathaniel Travis & Son |
| Travis | Travis, Senior & Travis |
| Travis | Travis, Wilson & Company Ltd |
| Tricket | Robert Tricket & Company |
| Tricket | Tricket, Haslehurst, Whiteley, & Pryor |
| Trickett | James Trickett |
| Trickett | John Trickett |
| Trickett | Walter Trickett & Company Ltd |
| Trickett | William Trickett |
| Triumph | Triumph Cutlery Co. |
| Truelove | Stuart Truelove |
| Trustwell | Trustwell Brothers Ltd |
| TTTS | T T T S |
| Tucker | S. Tucker |
| Tucker | Tucker, Fenton, Machon & Whitelock |
| Tudor | Tudor & Leader |
| Turner | Alfred Turner & Company |
| Turner | Bell & Turner |
| Turner | Brandon, Turner & Co |
| Turner | Furniss, Poles & Turner |
| Turner | H. Turner |
| Turner | James Turner & Davenport Ltd |
| Turner | Joseph Turner |
| Turner | Rawson & Turner |
| Turner | Ryalls, Turner & Company Ltd |
| Turner | Thomas Turner |
| Turner | Thomas Turner & Company (Sheffield) Ltd |
| Turner | Turner & Jepson |
| Turner | Turner, Naylor & Company Ltd |
| Turner | William Turner & Company / Turners (Eyre Street) Ltd |
| Turtle | Louis Henry Turtle Ltd |
| Turton | Frank Turton Ltd |
| Turton | George Turton & Sons |
| Turton | John Turton & Company Ltd |
| Twigg | Twigg Brothers & Company / Samuel Twigg & Sons |
| Twigg | William Twigg |
| Twigg | William Twigg & Son(s) |
| Tyler | John Tyler / William Tyler & Sons |
| Tyzack | Joseph Tyzack & Son Ltd |
| Tyzack | Needham, Veall & Tyzack Ltd |
| Tyzack | Pryor, Tyzack & Company |
| Tyzack | S. Tyzack & Son Ltd |
| Tyzack | W. A. Tyzack & Company Ltd |
