Name
- Jones, Henry Arthur, dramatist, 1851-19292
- Jones, Thomas, CH, Deputy Secretary to the Cabinet2
- Joynes, James Leigh, of the Social Democratic Federation2
- Kerr, Frederick, actor-manager2
- Kropotkin, Petr Alekseevich, Prince Russian revolutionary2
- Kyllmann, Otto, of Constable Archibald & Co publishers2
- Lambart, Frederick Rudolph, 10th Earl of Cavan, Field-Marshal2
- Lane, John, publisher, 1855-19252
- Lawson, Dora, schoolteacher2
- Lecky, S, sister? of J Lecky2
- Leonard, Joseph S, Father CM, of St Mary's Training College Hammersmith2
- Lewis, Cecil Arthur, MC, author and film director2
- Little, James Stanley, author2
- Littlewood, Samuel Robinson, journalist and drama critic2
- Lyttleton, Raymond Arthur, professor of theoretical astronomy at Cambridge University2
- MacDonald, James Ramsay, Prime Minister, 1866-19372
- MacFall, Frances Elizabeth, née Bellenden-Clarke, alias Sarah Grand, author, 1854-19432
- Macdona, Charles, theatre manager2
- Macy, George, Director of the Limited Editions Club2
- Madariaga, Salvador de, Spanish diplomatist and author2