Name
- Landseer, John, painter engraver and author1
- Langeron, Andrault, Count, Russian General1
- Langford, John1
- Langslow, Richard, of Hatton House, Hounslow1
- Lavington, Richard1
- Law, Robert William, of Dublin1
- Le-Poer Trench, Richard, 2nd Earl of Clancarty1
- Lee, Samuel, orientalist1
- Lethbridge, Thomas Buckler, 2nd Baronet 18151
- Levrault, F. G., publisher1
- Liechtenstein, Alois Joseph Johann Nepomuk, Prince, Austrian statesman1
- Liechtenstein, Léopoldine, Princess, widow of Prince Moriz Joseph Johann von Liechtenstein1
- Logan, James, author1
- Logan, Michael, inventor1
- Loughnan, Andrew, junior; merchant1
- Lowry-Corry, Armar, Viscount Corry; 3rd Earl Belmore 18411
- Lowry-Corry, Somerset, 2nd Earl of Belmore1
- Lowther, William, Viscount Lowther; Earl of Lonsdale 18071
- Ludwig Karl, King of Bavaria1
- Lygon, Henry Beauchamp, 4th Earl Beauchamp 1853, Lieutenant-Colonel; MP1