Name
- Howard, Charlotte Sophia, née Leveson-Gower, wife of Henry Charles Howard, 13th Duke of Norfolk, c 1788-18701
- Hughes and Kimber, copper and steel plate makers, 1850-18741
- Humboldt, Friedrich Heinrich Alexander, naturalist and explorer, 1769-18591
- Humphrys, Robert, book club organiser, Wiltshire, 1778-18391
- Hunt Fourdrinier and Co., stationers and paper manufacturers, fl 1846-18471
- Ibbetson, Levett Landon Boscawen, geologist and inventor, 1799-18691
- Isaac, John Raphael, engraver and lithographer, Liverpool, 1808-18701
- J. & H. G. Gibson, Writers of the Signet, Edinburgh, fl 1825-18741
- J. Bramah and Sons, locksmiths, engineers and millwrights, London, 1784-1
- J. C. Hinrichs'sche Buchhandlung, publishers and booksellers, Leipzig, ? 1798-18161
- J. Duboscq, optical instrument makers, 1849-18861
- J. F. Hennecart, gauzemaker, Paris, fl 18541
- J. Hodge, tailor, London, fl 18441
- J. L. Cox and Sons, printers, fl 18411
- Jackson, John Edward, antiquary, 1805-18911
- Jacquin, Joseph Franz Freiherr von, Austrian botanist, 1766-18391
- James Stillie, bookseller, fl 1846-18631
- James Veitch and Son, nurserymen, seedsmen and florists, fl 1859-18641
- Jenkinson, Charles Cecil Cope, 3rd Earl of Liverpool, politician, 1784-18511
- Jennings, Peter Harnett, of The Shrubbery, Dover, b 18161