- Hewitson, William C. (William Chapman), 1806-1878
- Hewitt, B R
- Hewitt, C. Gordon (Charles Gordon), 1885-1920
- Hewitt, Chad L. (Chad Leroi)
- Hewitt, Chester,
- Hewitt, David
- Hewitt, Edward R.
- Hewitt, Edward Ringwood, 1866-
- Hewitt, Florence
- Hewitt, G C
- Hewitt, G M
- Hewitt, George B.
- Hewitt, Godfrey M
- Hewitt, J
- Hewitt, John
- Hewitt, L. F.
- Hewitt, O H
- Hewitt, R A
- Hewitt, Robert G.
- Hewitt, S M
- Hewitt, Stephen
- Hewitt, Stephen M
- Hewitt-Cooper, Nigel
- Hewlett, James, 1768-1836
- Hewlett, R. Tanner (Richard Tanner), 1865-1940
- Hewlin, H L
- Hewson, H J
- Hewson, Helen
- Hewson, Helen J
- Hewson, R J
- Hewson, Rosemary J
- Hewson, William, 1739-1774
- Hewston, Nigel
- Hexamer, F. M.
- Hey
- Hey, Mrs.
- Hey, Donald L.
- Hey, Gerry
- Hey, Harry
- Hey, M H
- Hey, Max H.
- Hey, Rebecca.
- Hey, Thomas
- Hey, W. C.
- Hey, William, 1736-1819
- Heyd, A
- Heyde, Henri Christiaan van der.
- Heydemann, B
- Heydemann, F
- Heydemann, Fritz
- Heyden, H
- Heyden, K K
- Heyden, Karl Heinrich Georg von, 1793-1866
- Heyden, Lucas Friedrich Julius Dominicus von, 1838-
- Heyden, Lucas von, 1838-1915
- Heyden, Marx von der,
- Heydon, Paul A.
- Heydon, S L
- Heydon, Steve
- Heydon, Steven
- Heydon, Steven L
- Heydrich, F
- Heydrich, Ingrid
- Heydt, James A.
- Heyer, Carl Gustav, 1797-1856
- Heyer, Gustav
- Heyer, Gustav, 1826-1883
- Heyer, W R
- Heyer, W R
- Heyer, W Ronald
- Heyer, W Rondald
- Heyer, W. Ronald.
- Heykoop, M
- Heykoop, P
- Heyl, Paul R
- Heylaerts, F J M
- Heyland,
- Heyland, J. Douglas
- Heyland, Jean Christophe, 1792-1866
- Heyligers, Petrus
- Heyligers, Petrus C
- Heyman, R M
- Heymann, Eckhard W
- Heymann, Georg
- Heymans, Jean Francois, 1859-1932
- Heyme, Jenny
- Heymer, Armin
- Heymons, H.
- Heymons, Richard
- Heymons, Richard, 1867-
- Heyn, Michael W
- Heyn, William
- Heynderickx, Hanneloor
- Heyndrickx, Marc
- Heyne,
- Heyne, Alexander.
- Heyne, Benjamin
- Heyne, Ernst Bernard
- Heyne, K.
- Heynemann, D F
- Heynemann, D. F.
- Heynemann, David Friedrich
- Heynhold, Gustav, 1800-approximately 1860
- Heynhold, Gustav.
- Heynig, Lisa
- Heyning, John E.
- Heyns, J
- Heyns, Zacharias, 1566-1638
- Heyns-Veale, Elodie
- Heyrovsky, L
- Heyrovsky, Leo
- Heys, W. H.
- Heysen, Chris
- Heyser, Wolfgang
- Heyst, A. F. C. A. van
- Heyu, Lv
- Heyward, Jean
- Heyward, Kate
- Heywood, Hortense Butler, 1884-1977
- Heywood, James, 1810-1897
- Heywood, M J
- Heywood, V H
- Heywood, Vernon Hilton
- Heyworth, H
- Hezil, Wissem
- Hiam, Alex
- Hiatt, Glenn H.
- Hiatt, James M.
- Hiatt, Robert W
- Hiatt, Robert W.
- Hiatt, Robert.
- Hiawatha National Forest (Agency : U.S.)
- Hibbard, Claude W
- Hibbard, Claude William, 1905-1973
- Hibbard, Edmund Arthur.
- Hibbard, Hope, 1893-1988
- Hibbard, R. P.
- Hibbard-Robbins, T
- Hibben, Craig R.
- Hibben, George
- Hibberd, James Shirley.
- Hibberd, Shirley, 1825-1890
- Hibbert and Buist (Firm)
- Hibbert, A F
- Hibbert, Alden R.
- Hibbert, Annie C
- Hibbert, D Brynn
- Hibbert, F A
- Hibbert, F Alan
- Hibbert, J., active 1801-1815
- Hibbett, D S
- Hibbett, David
- Hibbitts, T J
- Hibino, Yusuke
- Hibon, M G
- Hibsch, Josef Emanuel
- Hibshman, E. K.
- Hice, Christine L
- Hice, Christine L.
- Hichborn, Philip, 1882-1912
- Hick, A J
- Hicke, Carole.
- Hickel, M R
- Hickel, R
- Hicken, Cristóbal M. (Cristóbal María), 1875-1933
- Hicker, Richard
- Hickernell, L M
- Hickernell, Louis Max
- Hickerson, Emma
- Hickerson, Emma L.
- Hickes, G. W.
- Hickey, David R
- Hickey, J J
- Hickey, Jena R.
- Hickey, Joseph J
- Hickey, Leo
- Hickey, Leo J
- Hickey, M F
- Hickey, M. Brian C.
- Hickey, Margaret B
- Hickey, R J
- Hickey, R James
- Hickey, Ralph
- Hickey, Ralph James
- Hickey, Wayne C. (Wayne Clayborne)
- Hickey, William (Martin Doyle) 1787-1875
- Hickey, William A
- Hickie, Ian
- Hickie, J. P.
- Hickie, John B
- Hickle, Lacey
- Hickler, M G
- Hickler, Matthew
- Hickler, Thomas
- Hicklin, Peter W
- Hickling, George
- Hickman, C P
- Hickman, C S
- Hickman, Carole S
- Hickman, Cleveland P
- Hickman, Cs
- Hickman, D T
- Hickman, E J
- Hickman, Ellen
- Hickman, Feryl Frances.
- Hickman, G L
- Hickman, Graham C
- Hickman, J C
- Hickman, J L
- Hickman, J. Cody
- Hickman, James C
- Hickman, James R.
- Hickman, Justin C.
- Hickman, Ken
- Hickman, Leonard E.
- Hickman, Richard W. (Richard West), 1852-1926
- Hickman, Scott
- Hickman, Spencer, fl 1670-1672
- Hickman, T J
- Hickman, V V
- Hickman, W. A.
- Hickok, John F
- Hickory Gardens,
- Hickory Hill Dahlia Farm.
- Hickory Hill Dahlia Farms.
- Hickory Hill Nursery,
- Hickory Hill Orchid Nurseries,
- Hickory Seed Co.
- Hickory Seed Company.
- Hickox-Rumsey Co., Inc.
- Hicks & Holder.
- Hicks and Holder Pecan Company.
- Hicks Nurseries (Westbury, Nassau County, N.Y.)
- Hicks, A L
- Hicks, Andrew
- Hicks, C H
- Hicks, Charles H
- Hicks, Charles H., entomologist.
- Hicks, Charles H., entomologist.
- Hicks, Charles,
- Hicks, D M
- Hicks, Damien
- Hicks, David J.
- Hicks, Edward.
- Hicks, Ellis A.
- Hicks, Fanny C.
- Hicks, Faye E. (Faye Ellen), 1957-
- Hicks, Frederic
- Hicks, Gilbert Henry
- Hicks, Gilbert Henry, 1861-1898