- Hahn, Jerold T.
- Hahn, Johann Sigmund
- Hahn, Karl Wilhelm, 1829-1887
- Hahn, L. R., Mrs.
- Hahn, Lisiane
- Hahn, Michael G.
- Hahn, Norbert
- Hahn, Norma Segatti, 1955-
- Hahn, Otto
- Hahn, Richard
- Hahn, Sarah Joy
- Hahn, Steffen
- Hahn, Walter Louis, 1879-
- Hahn, William James
- Hahnert, William F
- Hahn-Hadjali, Karen
- Hahn's Iris Garden.
- Hahn'sche Hofbuchhandlung,
- Hahn-Weinheimer, P
- Hahr, August 1868-1947
- Hai Yan, Wang
- Hai, Do Van
- Hai, Dong Jin
- Hai, Tran Van
- Haïcour, Robert
- Haid, J. F.
- Haid, Johann Jacob, 1704-1767
- Haidar, Ibrahim Khalil Al
- Haidar, Nabeel F.
- Haidar, Ricardo Flores, 1980-
- Haiden, Anita
- Haider, A A
- Haider, Sylvia
- Haider, Thomas S
- Haidinger, Karl, 1756-1797
- Haidinger, Wilhelm, 1795-1871
- Haidinger, William
- Haiduk, Michael W.
- Haig, D. W. (David W.)
- Haig, Elizabeth.
- Haig, Harold Axel.
- Haig, Irvine T. (Irvine Theodore),
- Haig, J. P.
- Haig, Janet
- Haig, Janet
- Haig, John G
- Haig, Susan M
- Haig, William
- Haigh, J. C.
- Haigh, Simone
- Haight, Bruce M.
- Haight, E. M.
- Haight, Frank Joshua, 1893-
- Haight, R. J. (Rufus J.)
- Haight, Robert G., 1955-
- Haigler, Daniella
- Haigwood, Jim
- Haij, Bernhard Julius
- Haij, Daniel, 1770-1824
- Haij, Isaacus,
- Hail, Anthony Godwin, 1924-
- Haila, Yrjö
- Haile, James
- Haile, Kelly C
- Haile, Mitiku
- Haile, N. S. (Neville Seymour)
- Haile, Zeweldi
- Haile-Dean Seed Co.
- Haile-Selassie, Yohannes
- Haileybury Natural Science Society.
- Hailman, Jack P
- Hails, John R.
- Hails, Rosemary
- Hailstone, T S
- Haime, Jules, 1824-1856
- Haimovici, Manuel
- Hain, James H. W.
- Hain, Melchior Gottfried, 1659-1719
- Hainault, Robert
- Haine, Brendan
- Haines City Nurseries.
- Haines Seed Company.
- Haines, Aaron M
- Haines, Arthur
- Haines, C E
- Haines, Charlotte M.
- Haines, Charlotte M. (Firm)
- Haines, David B.
- Haines, F. M.
- Haines, Henry Haselfoot, 1867-1943
- Haines, J
- Haines, J H
- Haines, James, 1822-
- Haines, Jennie Day, 1853-
- Haines, John H. (John Haldor) 1938-
- Haines, Lee
- Haines, Lundberg & Waehler.
- Haines, R Wheeler
- Haines, R. H.
- Haines, Richard Wheeler
- Haines, Robert
- Haines, Robert D
- Haines, Susan L
- Haines, T. Harvey
- Haines, William A.
- Haines, William E.,
- Haines, William P.
- Haines-Young, R. H. (Roy H.)
- Haines-Young, Roy
- Hainfellner, Patrick
- Hainisch, Michael, 1858-1940
- Hainke'S Nursery,
- Hains, Layla Aerne
- Hainsworth, Reginald George,
- Hair, Jakie Alexander, 1940-
- Hair, Jay D.
- Hairaud, Michel
- Hairault, Malo
- Haire, Jennifer L
- Hairston, N G
- Hairston, Nelson G
- Hairston, Nelson G.
- Hairul, Hairul
- Haislip, Nathan
- Haitao, Shi
- Haite, George Charles, 1855-1924
- Haiti. President (1818-1843 : Boyer)
- Haitlinger, Ryszard
- Haj, Ahmad
- Hajdamowicz, Izabela
- Hajdari, Avni
- Hajdu, Eduardo
- Hajduk, Adán
- Hajek, Ann E.
- Hajek, Jiri
- Hajek, Michal
- Hájek, Michal
- Hajela, K P
- Hajer, Jaromír
- Haji, Mohammed Ayoub
- Hajibabaei, Mehrdad
- Hajiqanbar, Hamidreza
- Hajjej, Ghailen
- Hájková, Petra
- Hajmolaali, Abdolazim
- Hajmoradi, Fatemeh
- Hajong, Sudhanya R
- Hajong, Sudhanya Ray
- Hajra, P K
- Hak, Jon C.
- Hakalová, Eliska
- Hakanson, T
- Hakansson, Eckart
- Hake, C. Napier.
- Hake, J. W.
- Hake, Tyler
- Hakim, Agus
- Hakim, Agus Alim
- Hakim, Jonathan
- Hakim, Luchman
- Hakim, Roi R. C.
- Hakimian, Saeedeh
- Hakiminejad, Motahareh
- Hakiwai, A. T. (Arapata Tamati)
- Hakkarainen, Harri
- Häkkinen, Markku
- Häkkinen, Sirpa
- Hakluyt, Richard, 1552?-1616
- Hakoneya Nurseries,
- Hakspiel-Segura, Cristian
- Haktert, Ernst
- Haktlaub, Gustav
- Halabowski, Dariusz
- Halaby, Reginald
- Halácsy, Eugen v., 1842-1913
- Halada, Marek
- Halafoff, Konstantin
- Halaj, Juraj
- Hałaj, Roman
- Halajian, Ali
- Halali, Dheeraj
- Halana, P
- Halanych, Kenneth M
- Halas, Dominik
- Halasy, Katalin
- Halàsz, Anna
- Halász, Krisztián
- Halberg, Kaj
- Halbert Seed Company.
- Halbert, H. A.
- Halbert, James N.
- Halbert, Susan
- Halbert, Susan E
- Halbgewachs, Jacob
- Halbherr, Bernardino
- Halbig, Leo E
- Halbronn, Chéri R.
- Halcomb, Kristina E
- Halcomb, Larry
- Halcsik, Leticia
- Halda, Josefp
- Haldane, J. B. S. (John Burdon Sanderson), 1892-1964
- Haldane, J. S. (John Scott), 1860-1936
- Haldane, L. A.
- Haldar, Babu Rakhal Das
- Haldar, Badri Prasad
- Haldeman, Samuel Stehman, 1812-1880
- Haldeman, Walter Newman, 1821-1902
- Halder, D D
- Halder, Ronald
- Halder, Ulrich
- Haldi, Jacques
- Haldin, Michael
- Hale Brothers.
- Hale Georgia Orchard Co.
- Hale Nurseries.
- Hale Orchard & Nursery Co.
- Hale, Abraham
- Hale, Allan M.
- Hale, Amanda M
- Hale, B W
- Hale, Cindy M.
- Hale, Desiree
- Hale, Dreamer L
- Hale, Dwight Edward, 1877-
- Hale, Edward E.
- Hale, Edwin M. (Edwin Moses), 1829-1899
- Hale, Elizabeth H.
- Hale, Elizabeth Helen, 1856-
- Hale, G E A
- Hale, George E
- Hale, Harry C.
- Hale, Henry.
- Hale, Herbert M. (Herbert Mathew), 1895-1963
- Hale, Horatio
- Hale, J. C.
- Hale, J. H.
- Hale, Jeanne
- Hale, John
- Hale, Josiah, approximately 1791-1856
- Hale, Leslie
- Hale, Linda J.
- Hale, M E Jr
- Hale, Malcolm B.
- Hale, Mason Ellsworth
- Hale, Mason Ellsworth, Jr., 1928-1990
- Hale, Molly O
- Hale, P. M. (Peter Mallett)
- Hale, Philip Henry,
- Hale, R. Scott