| Author | Titles | | 1.
| Léith, Caoimhín Mac Giolla | 11 | | 2.
| Leith, James A., 1931- | 1 | | 3.
| Leith, Leith, W. Compton, pseud. | 0 | | 4.
| Author is: Dalton, Ormonde Maddock, 1866-1945 | 1 | | 5.
| Leith, Marcus | 1 | | 6.
| Leith, Royal W. | 1 | | 7.
| Leithe-Jasper, Manfred | 4 | | 8.
| Leithold, Theodor von | 1 | | 9.
| Leitl, Alfons | 1 | | 10.
| Leitner, Bernhard, 1938- | 1 | | 11.
| Leitzmann, A. | 1 |
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