- Astruc, Jean
- Astúa, Diego.
- Astudillo, Orlando
- Astudillo, René
- Astudillo, Vanesa
- Astuti, Giovanni
- Astuti, Inggit Puji
- Astuya, Allisson
- Asuncion, Daisy A
- Asuncion, Marichelle
- Asuvapongpatana, Somluk
- Aswathanarayana, N V
- Aswathi, P
- Aszalós, Réka
- Asztalos, Marika
- Atab, Daniele R
- Atabey, Eşref
- Atahuachi Burgos, Margoth
- Ataíde, Glauciana da Mata
- Atala, Cristian
- Atallah, Sana Isa
- Atallah, Youssef C
- Ataman, Alper
- Atanasoff, Dimitr.
- Atanasov, Ivan
- Atanasov, Nasko
- Atanasov, Nikolay
- Atanasova, Gabriela
- Atanasova, Maria
- Atanassov, Neno
- Atanga, Fonyam
- Atangana Etémé, R
- Atascadero Seed Co.
- Atascadero Seed Company.
- Atasi, Mary
- Atchison Seed & Flower Store Co.
- Atchison Seed & Flower Store Co.,
- Atchley, William R. 1942-2020
- Ateca, N. S.
- Atehortua, Lucia.
- Atema, Jelle
- Atenafu Abate, Getnet
- Atenas, M.
- Atencio, Adrián
- Ateneo di Brescia.
- Ateyyat, Mazen A
- Atha Gardens,
- Atha, Daniel E.
- Athanas, Michael M
- Athanásio, Camila
- Athanassiou, Christos
- Athanassopoulos, G
- Athar, Mohammad
- Athauda, Senareth B P
- Athavale, Sudeep
- Athayde Filho, Francisco de Paula
- Athayde, ACR.
- Athayde, Eduardo Anversa
- Athearn, Herbert D
- Athens Nursery Company.
- Athersuch, John
- Athersuch, John
- Atherton, Cassandra 1974-
- Atherton, Lyn S
- Atherton, S. C.
- Atherton, Sarah
- Atherton, William
- Athey, Lillian Cox.
- Athey, Raymond
- Athias-Henriot, Claire, 1921-2004
- Athibai, Sujeephon
- Athiê, Samira.
- Athiê-Souza, Sarah Maria
- Athreya, Vidya R
- Aththanayaka, A.M.C. Prabhath
- Athwal, D. S.
- Atia, Atta.
- Atiqah, Aida Nur
- Atique, Usman Atique
- Atkeson, Thomas Clark, 1852-1935
- Atkin, Keith, 1938-
- Atkin, Paul
- Atkins Perennial Gardens.
- Atkins, A
- Atkins, A F
- Atkins, Albert J.
- Atkins, Andrew
- Atkins, Andrew F
- Atkins, Charles Grandison, 1841-
- Atkins, Edward G., 1939-
- Atkins, Emerson
- Atkins, Frederick L.
- Atkins, H. J.
- Atkins, Hannah
- Atkins, John
- Atkins, John D.
- Atkins, John W., of Key West, Fla.
- Atkins, John Wyley, 1857-1932
- Atkins, Leonard
- Atkins, Lyn
- Atkins, P. A.
- Atkins, Peter C.
- Atkins, R. P.
- Atkins, Richard Price.
- Atkins, Riley J
- Atkins, Ronald
- Atkins, W. N.
- Atkins, William Ringrose Gelston, 1884-
- Atkinson & Alexander.
- Atkinson Argles, Frank, 1816-1885
- Atkinson, A. T.
- Atkinson, C. J.
- Atkinson, D. A.
- Atkinson, E.
- Atkinson, Edmund, 1831-1901
- Atkinson, Edward L. (Edward Leicester), 1881-1929
- Atkinson, Edward, 1827-1905
- Atkinson, Edwin T. (Edwin Thomas), 1840-1890
- Atkinson, Edwin Thomas
- Atkinson, Eric C.
- Atkinson, Eric.
- Atkinson, F. E.
- Atkinson, Francis Parkman.
- Atkinson, George E., 1870-1913
- Atkinson, George Francis, 1854-1918
- Atkinson, George.
- Atkinson, H. M.
- Atkinson, Herbert, 1936
- Atkinson, Howard
- Atkinson, J. C. (John Christopher), 1814-1900
- Atkinson, J. E.
- Atkinson, James L.
- Atkinson, Jane
- Atkinson, John A
- Atkinson, John, 1787-1828
- Atkinson, K. T.
- Atkinson, Lenette May Rogers, 1899-
- Atkinson, Nancy
- Atkinson, Paul E.
- Atkinson, Penny
- Atkinson, Philip.
- Atkinson, Phillip W
- Atkinson, Reginald N.
- Atkinson, Robert E.
- Atkinson, Robert I.
- Atkinson, Roy.
- Atkinson, Shirley J.
- Atkinson, T. A.
- Atkinson, Thomas H.
- Atkinson, Thomas, 1729?-1798
- Atkinson, V. T. (Vickers T.) -1891
- Atkinson, W. S. 1820-1876
- Atkinson, W. S., active 1905-1906
- Atkinson, Wayne
- Atkinson, Wilmer co., Philadelphia,
- Atkinson, Wilmer, co., Philadelphia,
- Atkinson-Adams, Matthew R.
- Atkore, Vidyadhar
- Atlabahew, Yonas Terefe
- Atlanta Nurseries.
- Atlanta Nursery (Atlanta, Tex.)
- Atlanta Nursery Company.
- Atlantic Agricultural Economics Committee (Canada)
- Atlantic Monthly
- Atlantic Nursery and Small Fruit Farm.
- Atlantic Nursery Co.
- Atlantic Nursery Company Inc.
- Atlantic Nursery Company, Inc.
- Atlantic Oceanographic and Meteorological Laboratories.
- Atlantic Oceanographic Group (Canada)
- Atlantic Oceanographic Laboratories (U.S.)
- Atlantic Ornamental Nurseries (Cologne, N. J.)
- Atlantic Provinces Livestock Committee.
- Atlantic Shore Life Expeditions (1913)
- Atlantic Small Fruit Farm and Nursery.
- Atlas Powder Company.
- Atluri, Janaki Bai
- Atmowidi, Tri
- Atoda, Kenji
- Atramentowicz, Martine
- Atran, Scott
- Atristain, Federico,
- Atroch, André Luiz
- Atroshchenko, Margarita
- Atsaeva, Maret M.
- Atsaides, Samuel P.
- Atsatt, Peter R
- Attademo, Andrés M.
- Attal, Stéphane
- Attama Toykemuy, Marcelino,
- Attanayake, A M Achala S
- Attar, Farideh
- Attayde, José Luiz
- Atteke, Christiane
- Attems, Carl August Theodor Michael von, 1868-1952
- Attems, Carl Gr
- Attems, G
- Attenborough, David Sir
- Attencia, Rebeca
- Atterbury, Ruth Rand, 1895-
- Attermeyer, Katrin
- Attewell, P J
- Atteya, Atteya Mostafa
- Atthakor, Wisrutta
- Atthey, Thomas
- Attia, F I
- Attias, Nina
- Attié, Carole
- Attims, Y.
- Attipoe, Prudence Tonator
- Attiq-ur-Rahman.
- Atti-Serafini, L.
- Attix, Lee
- Attle, H G
- Attolini, Fabiano da Silva
- Atton, F. M.
- Attorre, Fabio
- Attumonelli, Michele, 1753-1826
- Atturio, J. M.
- Attwater, H. P. (Henry Philemon), 1854-1931
- Attwood, Deborah K
- Atty, D B
- Atwal, Avtar Singh, 1927-
- Atwater, Caleb, 1778-1867
- Atwater, Emily Paret, 1873-
- Atwater, Helen W. (Helen Woodard), 1876-1947
- Atwater, Joshua.
- Atwater, W. O. (Wilbur Olin), 1844-1907
- Atwell, C. B.
- Atwell, Charles B
- Atwood Brothers Rose Nursery.
- Atwood, A. E.
- Atwood, Alice C. (Alice Cary), 1876-1947
- Atwood, C. E.
- Atwood, C. J.
- Atwood, Charles, 1854-1929
- Atwood, David G
- Atwood, H. L.
- Atwood, Harry.
- Atwood, Howland
- Atwood, John E
- Atwood, John J.
- Atwood, John T
- Atwood, Jonathan L
- Atwood, Joshua P
- Atwood, N. Duane (Nephi Duane)
- Atwood, N. E.
- Atwood, Root & Co.
- Atwood, W. M.
- Atya Fruit Farm.