419 entries have been contributed to by Dews, D Colin:
- Ilkley
- Ince, Henry (1801-1887)
- Inman, Sir Philip Arthur (1892-1979)
- Irving, Sir Henry (1838-1905)
- Isaacs, George (1883-1979)
- Jackson, Thomas Norman, VC (1897-1918)
- Jenkins, Dr Ebenezer Evans (1820-1905; e.m. 1845)
- Jennings, Sir Robert Yewdall (1913-2004)
- Johnson, Joseph (1860-1944; e.m. 1882)
- Johnson, Matthew (1797-1864)
- Jones, Arthur Creech (1891-1964)
- Jones, John (Idrisyn), formerly Humffrey (1804-87)
- Jones, John, of Chester ( ? -1911/12)
- Joy family of Leeds
- Joynson, Charles William Davies (1862 - 1943)
- Kay, John Robinson (1806-1872)
- Kedward, Roderick Morris, MP (1881-1937; e.m. 1903)
- Keeling family
- Keig, Thomas (1833-1896)
- Keighley