Names
- Knappen, Loyal Edwin, 1854-1930.1
- Koch, Theodore Wesley, 1871-1941.1
- Ku Klux Klan (1915-)1
- La Follette, Robert M. (Robert Marion), 1855-1925.1
- LaFollette, Robert Marion, 1855-1925.1
- Labadie, Jo, 1850-1933.1
- Labadie, Joseph1
- Lansing, Robert, 1864-1928.1
- Lathrop, Rufus G.1
- Latting, Raymond.1
- Lawton, James Frederick, 1888-1969.1
- League to Enforce Peace.1
- Lejeune, John Archer, 1867-1942.1
- Leland, Frank1
- Leland, Frank Bruce.1
- Liebold, Ernest G., 1884-1
- Little, Clarence Cook, 18881
- Little, Clarence Cook, 1888-1971.1
- Lorch, Emil, 1870-1963.1
- Malcolm, George A. (George Arthur), 1881-1961.1