- Almeida, W. O.
- Almeida, Waltécio de Oliveira, 1971-
- Almeida, Wellington Romualdo de
- Almeida, Y. M.
- Almeida, Yane Santos
- Almeida, Zafira da Silva de
- Almeida-Cortez, Jarcilene Silva de.
- Almeida-Gomes, Mauricio
- Almeida-Lafetá, R De C
- Almeida-Leñero, L
- Almeida-Muradian Ligia Bicudo De
- Almeida-Neto, Mário
- Almeida-Reinoso, Diego
- Almeida-Reinoso, Freddy
- Almeida-Santos, P.
- Almeida-Santos, Patrícia
- Almeida-Scabbia, Renata Jimenez de
- Almeida-Silva, Lina Maria
- Almeida-Toledo, Lurdes Foresti de
- Almeida-Val, V. M. F. de (Vera M. F.), 1956-
- Almeloveen, Theodoor Jansson ab, 1657-1712
- Almen, Aug.
- Almenas, K.
- Almendarez-Hernández, Luis César
- Almendáriz, Ana
- Almendáriz, Javier
- Almendáriz-Tapia, Francisco Javier
- Almendinger, E. C.
- Almendos, A
- Almendros Martín, Gonzalo
- Almerão, Maurício Pereira
- Almeyda, Narciso.
- Almeyda-Artigas, Roberto Javier
- Almeyda-León, IH
- Almirón, Adriana.
- Almirón, Mariano
- Almiron, Martín
- Almirón, Walter Ricardo
- Almon S. Sawyer (Firm)
- Almon, Bruno
- Almonacid, Leonardo
- Almond, Eve
- Almoraz, Ramon.
- Almorza Gomar, David
- Almousawi, B
- Almquist, Erik 1892-1974
- Almquist, Ernst 1852-1946
- Almquist, Johan Magnus,
- Almqvist & Wiksells.
- Al-Munavvarī, Al-Ḥājj Mullā Muḥammad B. Muḥammad Ḥasan.
- Almy, F. W. C.
- Almy, J.
- Almy, Lloyd Huber, 1885-
- al-Nassākh, Maḥmūd Ṣidqī ,
- Alneer Brothers.
- Alneer Seed Company.
- Alneer, Raymond J.,
- Al-Obaidi, Ghasak
- Alois Frey (Firm)
- Aloise, Gaetano
- Alomar, Oscar
- Alomía, Luis Enrique
- Alon, Amos
- Aloncle, H
- Alonge, Samson O
- Alongi, G
- Alonso Núñez, Gabriel
- Alonso Peña, Manuel
- Alonso Reyes, María del Pilar
- Alonso Vargas, María Ángeles
- Alonso, Alexandre Antonio.
- Alonso, Álvaro
- Alonso, André Chein
- Alonso, Angela
- Alonso, Carmen
- Alonso, Cecilia A
- Alonso, Cecilia P.
- Alonso, Felipe
- Alonso, Fernando
- Alonso, Francisco
- Alonso, Guadalupe
- Alonso, Gustavo
- Alonso, J A
- Alonso, J C
- Alonso, Jorge Nicolás Marrero
- Alonso, Julián M
- Alonso, Leeanne
- Alonso, Ma Luisa Suarez
- Alonso, Marcelo F
- Alonso, María Ángeles
- Alonso, María Rosario.
- Alonso, Matías
- Alonso, Miguel
- Alonso, Patricia
- Alonso, Raquel
- Alonso, Raúl.
- Alonso, Regina de Azevedo Soares
- Alonso, Wladimir J.
- Alonso-Carvajal, David
- Alonso-Eguía-Lis, Perla Edith
- Alonso-Hernández, Carlos
- Alonso-Hernández, Nancy
- Alonso-Zarazaga, Miguel A.
- Alonzo J. Bryan (Firm)
- Alonzo, Popenoe Edwin
- Aloquio, Sergio
- Alos, Carmen
- Aloufi, Abdulhadi A
- Al-Owaisi, Arwa
- Alpagut-Keskin, Nurşen
- Alpat'ev, A. V.
- Alpatov, W W
- Alper, Alp
- Alper, Charlotte
- Alpert, Gary D.
- Alpert, Meredyth.
- Alpha Fruit Farm and Nursery.
- Alpha Nursery Co.
- Alpha Nursery.
- Alphand, Adolphe, 1817-1801
- Alpheis, M B
- Alphen, Joris van
- Alpheraki, S
- Alphonso, Arthur George.
- Alpin, K
- Alpin, T E H
- Alpine Gardens and Nursery.
- Alpine Nurseries.
- Alpine Nursery (Woodbury, N.Y.)
- Alpini, Alpino, 1603?-1637
- Alpini, Prosper, 1553-1617
- Alpino, Isa G
- Alpuche Solís, AG
- Alqahtani, Fahad
- Al-Qahtni, Abdulmani H.
- Alqarni, Abdulaziz S.
- AlQthanin, Rahmah
- Alquini, Yedo
- Al-Quran, Saleh A.
- Al-Rasheid, Khaled A S
- Alraun, Roman
- Al-Razi, Hassan
- Alrefaei, Abdulwahed
- Al-Robaae, K
- Alroy, John
- Al's Glad Patch.
- Alsabi, Mohammad
- Al-Sadi, Abdullah
- Al-Sahlani, Kadhim
- Al-Salem, Abdullah M.
- Alsberg, Carl, 1877-1940
- Al-Shamlih, Mohammed
- Alshammari, Ahmed
- Al-Shehbaz, Ihsan A., (Ihsan Ali) 1939-
- Al-Sheikhly, Omar Fadhil
- Al-Shwaiman, Hind A.
- Al-Sirhan, Abdulrahman
- Al-Sofyani, A. A
- Alsop, Richard, 1761-1815
- Alsos, Inger Greve
- Alsted, Johann Heinrich, 1588-1638
- Alston, A. H. G. (Arthur Hugh Garfit)
- Alston, Charles Henry.
- Alston, Charles, 1683-1760
- Alston, Diane
- Alston, Edward R. (Edward Richard) 1845-1881
- Alston, Garwood
- Alston, Jesse M.
- Alston, Ralph E.
- Alston, Richard M. (Richard Moss)
- Alstott, Arlston W.
- Alström, Per
- Al-Suyūṭī, Muḥammad Al-Zaqīm.
- Alt, Karen S
- Alt, Thomas
- Alt. F. Clark (Firm)
- Altaba, Cristian R.
- Altamaha Nurseries.
- Altamirano Azurduy, Saúl
- Altamirano, Adison
- Altamirano, Alejandra
- Altamirano, Fernando
- Altamirano, Tomás A.
- Altamont poultry company, incorporated.
- Altamonte Nurseries.
- Altangerel, Perle.
- Altarejos, J
- Altbäcker, V
- Altemuller, H.-J. (Hans-Jürgen) 1926-
- Alten, Johann Wilhelm von, 1770-1854
- Altena, Hector Livius van, zoologist
- Altenbach, Alexander Volker
- Altenbach, J. Scott
- Altenhofer, Ewald
- Alter Botanischer Garten Hamburg.
- Alter, Dinsmore 1888-1968
- Alter, S. Elizabeth.
- Alteri, Charlotte H.
- Alterman, Lynn E
- Altermatt, Florian
- Altés, A
- Altes, Alberto
- Altesor, Alice
- Altevogt, Rudolph.
- Altex Nursery Co.,
- Alth, Alojzy, 1819-1886
- Alth, Titus von, 1830-1917
- Altha Hall Gardens (Firm)
- Alther, Roman
- Altherr, Edmond
- Altherr, Sandra
- Althoff, Sérgio Luiz
- Altier, Elena
- Altifirma Nursery.
- Altig, Ronald
- Altiner, Demir
- Altınordu, Fahim
- Altıoğlu, Yusuf
- Altken, J D
- Altman, Bob.
- Altman, Jon
- Altman, Philip L.
- Altman, Robert L.
- Altman, Robert M
- Altmann, Margaret
- Altmann, Richard.
- Altmann, Scott H
- Altner, Helmut
- Alto, Barry
- Altoé, B. F.
- Altoff, Leon
- Alton E. Randall (Firm)
- Alton, Eduard d', 1772-1840
- Alton, Eduard d', 1803-1854
- Altonaga, Kepa
- Altop, R. Craig.
- Altosaar, I.
- Altran, A. E.
- Altrichter, Mariana
- Altringham, J D
- Altson, A. M.
- Altstatt, G. E.
- Altum
- Altum, Bernard, 1824-1900
- Altuna, Álvaro
- Altuntas, Cemil
- Altwegg, M.
- Aluja, Martín
- Alum, H. T.
- Alumbaugh, R. L.