- Long, C. A. E.
- Long, C. F.
- Long, C. L.
- Long, C. Robert
- Long, Charles Alan, 1936-
- Long, Charles E.
- Long, Charles R. (Charles Robert), 1936-
- Long, Chunlin
- Long, Daniel B.
- Long, David
- Long, David C.
- Long, David.
- Long, Donald G.
- Long, Douglas J
- Long, E. C., Mrs.,
- Long, Edward R. (Edward Ray), 1942-
- Long, Edward, 1734-1813
- Long, Elias A.
- Long, Elias A., 1849-1917
- Long, Elizabeth C
- Long, Ellen Call, 1825-1905
- Long, Esmond R. (Esmond Ray), 1890-
- Long, Feiyang
- Long, Feng-Yao
- Long, Frances Louise.
- Long, G. Everett
- Long, Garrell E
- Long, Harold C. (Harold Cecil), 1876-
- Long, Helen M.
- Long, Henry J.
- Long, Hui
- Long, J L
- Long, J. C.
- Long, J. D.
- Long, J. D. (James Dewey), 1899-1996
- Long, J. S.
- Long, James
- Long, James J., 1846-1931
- Long, James, Sir, 1862-1928
- Long, James.
- Long, Jiankun
- Long, Jian-Kun
- Long, Ji-Feng
- Long, Jiliang
- Long, Ji-Yan
- Long, John
- Long, John A
- Long, John D., 1874-
- Long, John Davis, 1838-1915
- Long, John Harper, 1856-1918
- Long, John M
- Long, Joseph Abraham, 1879-
- Long, Joseph W.
- Long, Josiah C., 1838-
- Long, Karen E
- Long, Khuat
- Long, Lorna.
- Long, Ma
- Long, Michael C
- Long, N. E.
- Long, Nicole R.
- Long, Pan
- Long, Qingde
- Long, R.
- Long, R. C.
- Long, Robert A.
- Long, Robert W.
- Long, S L
- Long, S. A.
- Long, S. H.
- Long, Shan-Lu
- Long, Sihan
- Long, Skye M
- Long, Stephen H. (Stephen Harriman), 1784-1864
- Long, Steven J.
- Long, V
- Long, Vu The.
- Long, W. H. (William Henry), 1867-1947
- Long, W. S.
- Long, W.H.
- Long, William J. (William Joseph), 1867-1952
- Long, Yang
- Long, Yan-Yan
- Long, Ying
- Long, Zhengmin
- Longacre, Adrian W.
- Longacre, James Barton, 1794-1869
- Longacre, William A., 1937-
- Longair, Robert W.
- Longakit, Belinda
- Long-Bell Lumber Co.
- Long-Bell Lumber Co. Forestry Department.
- Longbottom, A E
- Longbottom, M R
- Longbottom, Simon G.
- Longcore, J R
- Longcore, JE.
- Longcore, Jerry R
- Longcore, Joyce E
- Longcore, JR.
- Longcore, Travis
- Longcore, Travis R
- Longden Jr., Grafton,
- Longden, Grafton, Jr.,
- Longdon, M R
- Longenecker, Joseph Bender.
- Longenecker, Ken
- Longenecker, Kenneth R
- Longerede, Ch. de la
- Longeri, S L
- Longet, F.-A. (François-Achille), 1811-1871
- Longfellow, Henry W.
- Longfield Iris Farm
- Longfield Iris Farm (Bluffton, Ind.)
- Longfield, C E
- Longhi, S. J.
- Longhi, Solon Jonas
- Longhi-Wagner, Hilda Maria.
- Longhi-Wagner, HM.
- Longhofer, Lisa K
- Longhorn, Stuart
- Longhorn, Stuart J
- Longhurst, A R
- Longing, John T.
- Longino, John
- Longino, John T.
- Longino, John T.
- Longino, JT
- Longinos Martínez, José, 1803
- Longland, David
- Longland, William S
- Longley, Alice.
- Longley, Don
- Longley, G
- Longley, Glenn
- Longley, W
- Longley, W. E.
- Longley, William Harding, 1881-1937
- Longman, Brown, Green, Longmans, & Roberts,
- Longman, H A
- Longman, Heber A
- Longman, Heber Albert
- Longman, Hebert A
- Longman, Herber A
- Longman, Hurst, Rees, Orme, and Brown.
- Longman, J. H.
- Longman, Rees, Orme, Brown, and Green,
- Longman, Thomas, 1731-1797
- Longman, V M
- Longmans, Green, and Co.
- Longmire, John
- Longmire, Jonathan L
- Longmire, Jonathan L.
- Longmore, Andrew
- Longmore, N W
- Longmore, Richard
- Longmore, Wayne
- Longmuir, Stuart
- Longo, Ana Luiza Bonfin
- Longo, Ana V
- Longo, F J
- Longo, Frank J
- Longo, Gary
- Longo, JM.
- Longo, José Milton
- Longo, Karla M.
- Longo, María V.
- Longo, María Victoria
- Longo, Michele M.
- Longo, Regina M.
- Longo, Regina Márcia
- Longoria, Luis Carlos
- Longpre, E K
- Longrigg, Sarah
- Long's Gardens.
- Long's Water Gardens.
- Longstaff, George Blundell, 1849-
- Longstaff, Jane
- Longstaffe, Frederick J.
- Longstreet, R J
- Longstreth, W. B.
- Longton, G D
- Longton, R. E.
- Longue, Phillip
- Longui, Eduardo Luiz
- Longview (Crichton, Ala. : Firm)
- Longwell, Chester R. (Chester Ray), 1887-1975
- Longwood, Franklin R., 1914-
- Longworth, N. 1782-1863
- Longyear, B O
- Longyear, Burton Orange, 1868-
- Loni, Augusto
- Lonicer, Adam, 1528-1586
- Lonmg, John Edward
- Lönnberg, Einar, 1865-1942
- Lonner, Terry N.
- Löns, Hermann, 1866-1914
- Löns, Rudolf.
- Lonsdale Nursery.
- Lonsdale, D J
- Lonsdale, Darcy J
- Lonsdale, David
- Lonsdale, Henry
- Lonsdale, Henry, 1816-1876
- Lonsdale, John T.
- Lonsdale, Owen
- Lonsdale, Owen
- Lonsdale, W. 1794-1871
- Lonsdale, William
- Lonsdale, Wm
- Lønseth, Lasse
- Lontra, Juliana Doyle
- Loo, A. H. B.
- Loo, Adrian Hock Beng
- Loof, P A A
- Loog, G A
- Looi, Su Hoon.
- Looijestijn, Sylvia
- Look & Smith.
- Lookabaugh, Patrick S
- Look-Away Gardens,
- Looker, Samuel J. 1888-1965
- Lookout Nursery and Greenhouses.
- Looman, J. 1919-1991
- Looman, S J
- Loomans, Antoon
- Loomis Carnation Co.
- Loomis Carnation Company.
- Loomis Floral Co.
- Loomis, E C
- Loomis, Eben J.
- Loomis, Elias, 1811-1889
- Loomis, Frederic Brewster, 1873-1937
- Loomis, H. F. (Harold Frederick), 1896-1976
- Loomis, Harris, 1795-1837
- Loomis, Henry Meech.
- Loomis, John B.
- Loomis, Leverett M
- Loomis, Leverett Mills
- Loomis, Martha Louise
- Loomis, Richard B.
- Loomis, Robert C.
- Loomis, Ronald B
- Loomis, S H
- Loomis, Sh
- Loomis, Tom H. W.
- Loomis, W. Farnsworth 1914-
- Looney, Brian
- Looney, Brian P
- Looney, C N