409 entries have been contributed to by Dews, D Colin:
- Thomas, Dr. Charles Anthony, CBE (1928-2016)
- Thompson, John Day (1849-1919; e.m. 1871)
- Thorncliffe Ironworks, Sheffield
- Tomlinson, Robert Parkinson, MP (1881-1943)
- Torr, William (1853-1939)
- Toulmin, Sir George (1857-1923)
- Townend family
- Toyn, Joseph (1838-1924)
- Truscott, Thomas (1848-1888; e.m. 1871)
- Tunbridge, Sir William John (1876-1939; e.m.1900)
- Turner family of Rochdale
- Turton, George (1791-1852)
- Vaughan, John (1799-1868)
- Verran, John (1856-1932)
- Waddington, William (1816-1891)
- Wainman, Thomas H. (1856-1921; e.m. 1882)
- Wainwright, Richard Scurrah, MP (1918-2003)
- Wakefield, Yorks
- Wakerley, Arthur (1862-1931)
- Wallis, Thomas (1841-1930)
- Walmsley brothers
- Wardle, Dr William Lansdell (1877-1946; e.m. 1901)
- Waterston, Alfred Edward (1880-1964)
- Watkinson, Charles Kynman (1858-1934)
- Watson, James Charles (1896-1984)
- Watson, Thomas (1821-1887)
- Wellock/Willock, Wilfred (1879-1972)
- West, Nathaniel (1794-1864, e.m. 1820)
- Whiteley,William (1882-1955)
- Whittaker, Thomas (1813-1899)