| Aa, H.A. van der |
| Aalbu, R. (Rolf) |
| Aartsen, B. van (Bob) |
| Aartsen, J.J. van (Jacobus) |
| Abadjiev, S.P. (Stanislav) |
| Abarenkov, K. (Kessy) |
| Abate, F. (Frank) |
| Abbott, I.A. |
| Abbott, J. (John) |
| Abbott, L. |
| Abbott, R.T. (Robert Tucker) (1919 - ) |
| Abdala, V. (Virginia) |
| Abdel-Wahab, M.A. (Mohamed) |
| Abdullah, S.K. |
| Abdulla-Khan, R. |
| Abdul-Salam, J. (Jasem) |
| Abé, H. (Hiroshi) |
| Abé, T.H. (Tohru) |
| Abel, O. (Othenio) (1875 - 1946) |
| Abele, L.G. (Lawrence) |
| Abele-Horn, M. |
| Abell, R. (Robin) |
| Abercrombie, J. |
| Abilhoa, V. |
| Abonnenc, E. |
| Abrams, G.S. |
| Abu Elzein, E.M.E. |
| Abucay, L. |
| Acero P., A. (Arturo) |
| Achterberg, C. van (Kees) |
| Ackermann, R.R. (Rebecca) |
| Ackery, P.R. |
| Acra, F. (Fadi) |
| Aczél, M. |
| Adachi, R. |
| Adam, K.D. |
| Adam, P.J. (Peter) |
| Adams, A. (Arthur) |
| Adams, A.E. |
| Adams, C.B. |
| Adams, C.J. (Chris) |
| Adams, H. (Henry) |
| Adams, J. |
| Adams, M.J. (Michael) |
| Adams, P.A. |
| Adams, R.M.M. |
| Adamski, D. (David) |
| Adans. | Adanson, M. (Michel) (7 Apr 1727 - 3 Aug 1806): French botanist |
| Addicott, W.O. (Warren) (1930 - ) |
| Adis, J. |
| Adkison, M.A. (Mark) |
| Adl, S.M. (Sina) |
| Adlard, R. (Robert) |
| Adlard, R.D. |
| Adler, J. (Julius) |
| Adrain, J.M. (Jonathan) |
| Adriaenssens, E.M. (Evelien) |
| Adrianov, A.V. |
| Aedo, C. (Carlos) |
| Aescht, E. (Erna) |
| Afanasieva, M.S. (Marina) |
| Afanasjeva, M.S.: "М.С. Афанасьева" |
| Afshar, F. (Freydoun) |
| Agardh, C. |
| C.Agardh | Agardh, C.A. (Carl Adolf) (1785 - 1859) |
| Agardh, J. |
| J.Agardh | Agardh, J.G. (Jacob Georg) (1813 - 1901) |
| Agarkov, Y.V. (Yurii) |
| Agassiz, L. (Louis) (1807 - 1873) |
| Agatha, S. (Sabine) |
| Agnarsson, I. |
| Agnolin, F.L. (Federico) |
| Agnolín, F.L. (Federico) |
| Agosti, D. |
| Agosti, J. |
| Agrawal, Y. (Yamini) |
| Aguilera, O.A. |
| Aguillon Martinez, M.C. (Martha [Carolina]) |
| Aguinaldo, A.M.A. (Anna Marie) |
| Agustí, J. (Jordi) |
| Ahl, E. |
| Ahlberg, P.E. (Per Erik) |
| Ahlbrandt, T.S. (Thomas) |
| Ahmadjian, V. |
| Ahmed, M.F. |
| Ahmed, S.I. |
| Ahnelt, H. |
| Ahounta, D. (Djimdoumalbaye) |
| Ahyong, S.T. (Shane) |
| Aime, M.C. (Catherine) |
| Ainsw. | Ainsworth, G.C. (Geoffrey Clough) (1905 - 1998): Mycologist |
| Airy Shaw, H.K. |
| Aislabie, J. (Jackie) |
| Aitken, E.H. |
| Aiton, W.T. (William Townsend) (1766 - 1849) |
| Aiwu, J. (Jiang) |
| Ajello, L. (Libero) |
| Akagawa-Matsushita, M. |
| Akaishi, F. |
| Akama, A. (Alberto) |
| Akhtar, M.S. |
| Akihito (23 Dec 1933 - ): Emperor of Japan |
| Akins, L. (Lad) |
| Akita, G.Y. |
| Akkari, N. (Nesrine) |
| Aksenova, O.V. (Olga) |
| Aktipis, S.W. (Stephanie) |
| Alabouvette, C. |
| Alba, D.M. (David) |
| Albano, A.P.N. |
| Albaret, J.-L. |
| Albers, J.C. (Johann Christian) (13 Mar 1795 - Sep 1857): German physician and malacologist. |
| Albert, J.S. (James) |
| Albert, V. |
| Albert I (1848 - 1922): Prince of Monaco |
| Alberti, A. (Alberto) |
| Alberti, G. |
| Alberts, B. (Bruce) |
| Alcaraz, H.S.V. (Héctor) |
| Alcock, R. (Rutherford): (latinized: Alcoquius) |
| Alder, J. (Joshua) |
| Alderslade, P. |
| Alderton, D. (David) |
| Aldrete, A.N.G. |
| Aldrich, H.C. |
| Aldridge, R. |
| Aldridge, R.J. (Richard) |
| Aldrovandi, U. (Ulisse) (1522 - 1604) |
| Aleksandrushkina, N.I. |
| Alekseev, V.I. (Vitaly) |
| Alemany, J.A. |
| Aleoshin, V.V. (Vladimir) |
| Aleshin, V.V. |
| Alexander, A.M. (Annie [Montague]) (1867 - 1950) |
| Aléxéieff, A. |
| Alexeyev, D. |
| Alexop. | Alexopoulos, C.J. (Constantine John) (1907 - 1986): American mycologist |
| Alfred, E.R. (Eric) |
| Alfredsson, G.A. |
| Aliouat, E.M. (El Moukhtar) |
| Alivon, E. (Eliane) |
| Alkan, C. (Can) |
| Allain, R. (Ronan) |
| Allan, R.S. |
| Allard, M. (Marc) |
| Allcock, A.L. |
| Allen, B.D. (Bruce) |
| Allen, G.M. (Glover Morrill) (8 Feb 1879 - 14 Feb 1942): American zoologist |
| Allen, G.R. (Gerald) |
| Allen, H. |
| Allen, J.A. (Joel Asaph) (19 Jul 1838 - 29 Aug 1921): American zoologist and ornithologist. |
| Allen, J.A. |
| Allen, J.M. |
| Allen, M.W. |
| Allison, F.R. (Bertha) |
| G.J.Allman | Allman, G.J. (George James) (1812 - 24 Nov 1898): Irish ecologist, botanist and zoologist. |
| Allman | Allman, W. (William) (7 Feb 1776 - 8 Dec 1846): Irish botanist. |
| Allmon, W.D. (Warren) |
| Allnutt, T. (Tom) |
| Allnutt, T.F. (Thomas) |
| P.Allorge | Allorge, P. (Pierre) (1891 - 1944) |
| Allsopp, M.T.E.P. (Paula) |
| Almada, V.C. |
| Almeida, T.E. (Thaís Elias) |
| Almeida Campos, D. de (Diógenes): Brazilian geologist and vertebrate paleontologist. |
| Almendáriz, A. (Ana) |
| Almirón, A. |
| Alnaji, N. (Nassir) |
| Alonso, O. |
| Alonso-Zarazaga, M.A. (Miguel [Angel]) |
| Alphen, J.J.M. van |
| Al-Rasheid, K.A.S. (Khaled) |
| Alrich, P. (Peggy) |
| Alt, K.W. (Kurt) |
| Altaba, C.R. (Cristian) |
| Altevogt, R. (Rudolf) |
| Alvarado-Ortega, J. (Jesús) |
| Alvarez, B. (Belinda) |
| Alvarez, I.F. |
| Alvarez de Glasby, B. (Belinda) |
| Alvarez del Toro, M. (Miguel) |
| Alvarez-Pellitero, P. |
| Alves, R. |
| Alvey, C.H. |
| Amann, R. (Rudolf) |
| Amano, K. |
| Amano, Y. (Yuki) |
| Amaoka, K. |
| Amar, R. |
| Amaral, W.W. (William) ( - 20 Mar 2015) |
| Amaral Zettler, L.A. |
| Ambrosio, A. (Alfredo) |
| Ambrosio, S. d' |
| Amedegnato, C. |
| Ameghino, C. |
| Amemiya, S. |
| Amerom, H.W.J. van |
| Ames, B.N. (Bruce) |
| Ames, R.N. |
| Améziane, N. (Nadia) |
| Amidala, P. (Padme): Fictional character from the film "Star Wars". |
| Amiet, J.-L. (Jean-Louis): Herpetologist |
| Amin, O.M. (Omar) |
| Amin-ud-Din |
| Ammer, M. (Max) |
| Ammirati Jr., J. |
| Amon, E.O. (Edward) |
| Amoozegar, M.A. (Mohammad Ali) |
| Amori, G. (Giovanni) |
| Amrine, J.W. (James) |
| Amson, E. (Eli) |
| Amstutz, E. |
| Amundson, R. (Ronald) |
| Anantharaman, K. (Karthik) |
| Ancey, C.-F. |
| Anderberg, A.A. |
| Andersen, G.L. (Gary) |
| Andersen, K.I. |
| Andersen, N.M. |
| R.A.Andersen | Andersen, R.A. (Robert [Arthur]) |
| Andersen, T. |
| Anderson, A.R. |
| Anderson, C.D. (Carl) |
| Anderson, C.G. |
| Anderson, C.P. (Christopher) |
| Anderson, F. |
| Anderson, G. |
| H.M.Anderson | Anderson, H.M. (Heidi [Marguerite]) (1944 - ) |
| Anderson, I.J. (Iain) |
| J.M.Anderson | Anderson, J.M. (John [Malcolm]) (1943 - ) |
| Anderson, J.S. (Jason) |
| Anderson, L.C. (Laurie) |
| Anderson, L.I. (Lyall) |
| Anderson, M.E. |
| Anderson, M.M. (Michael) |
| Anderson, N. (Natali) |
| Anderson, O.R. (Roger) |
| Anderson, R. (Roy) |
| Anderson, R.P. (Robert) |
| Anderson, R.P. (Ross) |
| Anderson, W.R. |
| Anderson Jr., W.D. |
| Andersson, K. |
| Andersson, L.G. |
| Andrade, M.B. de (Marco Brandalise) |
| Andrade, M.L. De (Maria) |
| Andrade, P. |
| Andrássy, I. (Istvan) |
| Andre, H.M. |
| André, H.M. (Henri) |
| André, M. (Marc) |
| Andreadis, T.G. |
| Andree, K.B. |
| R.V.Andrejeva | Andreeva, R.V. (Rymma Vasylivna) (1941 - ): Mycology |
| Andreone, F. |
| Andres, B. |
| Andres, H.G. |
| G.W.Andrews | Andrews, G.W. (George) (1929 - ) |
| H.N.Andrews | Andrews, H.N. (Henry Nathaniel) (1910 - 2002): Palaeobotanist |
| Andrews, J.R.H. (John) |
| Andriantompohavana, R. |
| Anfimov, A.L.: ["А.Л. Анфимов"] |
| Angas, G.F. |
| Angel, F. |
| Angel, M.V. (Martin) |
| Angelini, F. (Fernando) |
| Angell, R.W. |
| Angermann, R. (Renate) |
| Angrisano, E.B. |
| Anker, A. (Arthur) |
| Annandale, T.N. |
| Anquetin, J. (Jérémy) |
| Anton, H.E. ([Hermann] Eduard) |
| Antón, J. |
| Antón, M. (Mauricio) |
| Antonín | Antonín, V. (Vladimír) (1955 - ): Mycologist |
| Antonio-Nkondjio, C. |
| Antony, D.W. |
| Anwar, M. |
| Aoki, J.-i. (Jun-ichi) |
| Aoki, R. (Riosuke) |
| Aoki, T. (Takashi) |
| Apakupakul, K. (Kathleen) |
| Apaldetti, C. (Cecilia) |
| Apesteguía, S. (Sebastián) |
| Aphrodite: Greek goddess of love, beauty, pleasure, and procreation. |
| Apostolov, A. |
| Appellöf, A. |
| Appeltans, W. |
| Apstein, C. |
| Aptroot, A. (André) |
| Aragog: Fictional spider in J.K. Rowling's book series "Harry Potter". |
| Arana, M.D. (Marcelo Daniel) |
| Aranciaga Rolando, A.M. (Alexis) |
| Aranishi, F. (Futoshi) |
| Araujo, R. (Rafael) |
| Araújo, D.C. |
| Araújo, M.S. de (Marcel Santos) |
| Arbour, V.M. (Victoria) |
| Arces H., M. (Mariangeles) |
| Archer, M. (Michael) |
| Archer, W. (William) |
| Archibald, J.D. (David) |
| Archibald, J.M. (John) |
| R.E.M.Archibald | Archibald, R.E.M. (1940 - ) |
| Archibald, S.B. (Bruce) |
| Archilocus (c. 680 BC - c. 640 BC): Greek lyric poet |
| Arcucci, A. (Andrea) |
| Ardelean, A. (Adorian) |
| Aresch. | Areschoug, J.E. (John Erhard) (1811 - 1887) |
| Aria, C. (Cédric) |
| Arias, J.S. (Salvador) |
| Arif, M. |
| Arillo, A. (Antonio) |
| Ariola, V. (Vincenzo) |
| Aristoteles (384 BC - 322 BC) |
| Ariunchimeg, Ya. |
| Arkel, J. van (Jan) |
| Arkhangelskaya, A.D. |
| Arkush, K.D. (Kristen) |
| Armbruster, J. (Jon[athan]) |
| Armbruster, J.W. (Jon[athan]) |
| Armbruster, T. (Thomas) |
| Armijo, E. (Eric) |
| Armstrong, D.W. (Daniel) |
| Armstrong, N.A. (Neil [Alden]) (5 Aug 1930 - 25 Aug 2012): American astronaut and the first person to walk on the Moon. |
| Armstrong, R.L. (Richard) |
| Arnal, C. |
| Arndt, H. (Hartmut) |
| Arnett Jr., R.H. |
| Arnofsky, P. |
| Arnold, E.N. |
| Arnold, P. (Peter) ( - 7 Mar 2006) |
| Arnold, R. (Ralph) |
| Arnolds, E. (Eef) |
| Arnoult, J. (Jacques) |
| Arntzen, J.W. |
| Aronowicz, J. (Jochanan) |
| Arratia, G. (Gloria) |
| Arriagada, B. (Beto) |
| Arrow, G.J. (Gilbert) |
| Arseculeratne, S.N. |
| Arsenault, M. (Marius) |
| Arsenault family of Prince County, Prince Edward Island, Canada |
| Arslan, N. (Naime) |
| Artal, P. (Pedro) |
| Artedi, P. (Peter) (1705 - 28 Sep 1735) |
| Arthur | Arthur, J.C. (Joseph Charles) (1850 - 1942) |
| Artigas, P.d.T. |
| Artioli, G. (Gilberto) |
| Artois, T. (Tom) |
| Artois, T.J. (Tom) |
| Arx, J.A. von |
| Asch, M. van |
| Ascherson, P. (Paul) (1834 - 1913): German botanist |
| Asch. | Ascherson, P.F.A. (Paul Friedrich August) (1834 - 1913): German botanist |
| Aseeva, N.L. |
| Asfaw, B. (Berhane) |
| Ashby, E. |
| Ashen, A. |
| Asher, R.J. (Robert) |
| Ashmead, W.H. (William) |
| Ashton, J.H. |
| Ashworth, M.P. (Matt) |
| Aspöck, H. (Horst) |
| Assumpcao, M.I. |
| Atabekov, J.G. |
| Atamehr, A. |
| Ates, R.M.L. (Ron) |
| Athias-Henriot, C. |
| Atkins, D. |
| Atkins, M.D. |
| Attenborough, D.F. (David [Frederick]) (8 May 1926 - ): British broadcaster and naturalist |
| Attia, Y. (Yousry) |
| Atwater, A.L. (Amy) |
| J.J.Atwood | Atwood, J.J. (John [Jacob]) (1981 - ) |
| Atwood, N.D. |
| Atyeo, W.T. |
| Audouin, J.V. (Jean Victor) (1797 - 1841) |
| Audus, L.J. |
| Auffenberg, W. (Walter) |
| Auffray, J.-C. |
| Auge, A. |
| Augsten, K. |
| Aukema, B. (Berend) |
| Austin, J.J. (Jeremy) |
| Autenrieth, I.B. |
| Averianov, A.O. (Alexander) |
| Averincev, V.G. |
| Avicenna (981 AD - 1037 AD) |
| Avio, L. |
| Avron, M. (Mordhay) |
| Awono-Ambene, H.P. |
| Ax, P. (Peter) (1927 - ) |
| Axe, L. (Lindsey) |
| Ayoub, H. |
| Ayres, J.M. (José Márcio) ( - 2003): Brazilian biologist |
| Azam, F. (Farooq) |
| Azar, D. (Dany) |
| Azariah, J. (Jayapaul) |
| Azevedo, C. (Carlos) |
| Azevedo, C.O. |
| Azevedo, J.M.N. |
| Azpelicueta, M. de las Mercedes: Ichthyologist and paleoichthyologist from La Plata, Argentina |
| Azuma, M. (Masao) |
| Azvolinsky, A. (Anna) |