- Holl, Moritz
- Holl, William, 1771-1838
- Hollá, Katarína
- Holla, Teresa A.
- Hollaender, Alexander
- Hollaender, Alexander, 1898-
- Holland Nurseries (Aalsmeer, Holland)
- Holland & Co.
- Holland Arms,
- Holland Bulb Co.
- Holland Bulb Company (Holland, Mich.)
- Holland Bulb Company (Mount Vernon, Wash.),
- Holland Bulb Gardens, Inc.,
- Holland Bulb Gardens.
- Holland Bulb Growers Inc.,
- Holland Bulb Importing Co.
- Holland Dahlia Gardens,
- Holland Nurseries.
- Holland Nursery.
- Holland Valley Gardens,
- Holland Valley Glads,
- Holland Winter Garden,
- Holland, A E
- Holland, A H
- Holland, Ailsa
- Holland, Ailsa E
- Holland, Alexandra
- Holland, Ashley Peregrine
- Holland, Brenden S
- Holland, C H
- Holland, C Thurstan
- Holland, Charles Hepworth
- Holland, Christie A
- Holland, Cyril E.
- Holland, D C
- Holland, D.G.
- Holland, Dan
- Holland, Dan C
- Holland, Douglas
- Holland, E. B.
- Holland, F. D. Jr. Holland, Frank Delano
- Holland, F. D., Mrs.
- Holland, Francis J. Sir, 1828-1907
- Holland, G. C. (George Calvert), 1801-1865
- Holland, George E
- Holland, George P. (George Pearson), 1911-
- Holland, Henry, 1583-1650?
- Holland, Henry, Sir, 1788-1873
- Holland, J M
- Holland, J. R.
- Holland, J.W.
- Holland, John
- Holland, John D
- Holland, John Henry 1869-1950
- Holland, John J
- Holland, John M
- Holland, Julian
- Holland, L Z
- Holland, Leicester Bodine, 1882-
- Holland, Leicester Bodine, 1882-
- Holland, Linda Z
- Holland, Lindsay
- Holland, M M
- Holland, Marjorie M
- Holland, N D
- Holland, Nicholas D
- Holland, Peter W.H.
- Holland, Philemon, 1552-1637
- Holland, Philip W.
- Holland, Philo Leon.
- Holland, R
- Holland, R B
- Holland, Richard
- Holland, Richard.
- Holland, Robert F
- Holland, Robert, 1829-1893
- Holland, Thomas H
- Holland, Timothy
- Holland, V L
- Holland, V M
- Holland, Victor
- Holland, W N
- Holland, W. J. (William Jacob), 1848-1932
- Holland, Wilbur C.
- Hollanda Carvalho, Pedro
- Holland-American Seed Co.
- Hollandbartels, L E
- Hollander, Allan D
- Hollander, J D
- Holländer, R
- Hollander, R R
- Hollander, Robert R.
- Hollander, W F
- Hollandia (Snyder, N.Y.),
- Hollandia Gardens (Springfield, OH)
- Hollandia Gardens (Springfield, OH),
- Hollandsche Maatschappij der Wetenschappen
- Hollandse Maatschappye Wetenschappen te Haarlem.
- Hollar & Company,
- Hollar, V. E.,
- Hollar, Wenceslaus, 1607-1677
- Hollard, H
- Hollard, H L
- Hollard, H. 1801-1866
- Hölldobler, Bert
- Holle, F.
- Holle, Thomas
- Holleman, Ayco
- Holleman, J J
- Holleman, John T
- Holleman, Wouter
- Hollenbach, Kandace D.
- Hollenbach, Peter.
- Hollenbaugh, William Charles.
- Hollenberg, G J
- Hollenberg, George J
- Hollenberg, Lloyd C L
- Hollenshead, Marci
- Hollenshead, Marci G.
- Höller, Chr.
- Höller, Patrik
- Holler, Rebecca L
- Höllermann, P
- Holleuffer, Carol.
- Holley, A J F
- Holley, Horace, 1781-1827
- Holley, Myron, 1779-1841
- Holley, O. L. (Orville Luther), 1791-1861
- Holley'S Nursery,
- Hollick, A. T.,
- Hollick, Charles Arthur, 1857-1933
- Hollick, Frederick, 1818-1900
- Hollick, P
- Hollick, Review By: Arthur
- Holliday, C S
- Holliday, C W
- Holliday, Charles
- Holliday, Charles W
- Holliday, D
- Holliday, Margaret
- Holliday, Trenton W
- Hollier, Anita
- Hollier, John
- Hollier, John A
- Hollihn, Uwe
- Holliman, R B
- Hollin, W
- Hölling, Doris
- Hollinger, A H
- Hollinger, Clémence
- Hollinger, Jason
- Hollinghurst, Honor
- Hollinghurst, Honor H
- Hollinghurst, Honor M
- Hollingshead, Lillian, 1900-
- Hollingshead, R. S. (Robert Sullivan), 1888-
- Hollingsworth, B D
- Hollingsworth, Bradford D
- Hollingsworth, Bradford Damion
- Hollingsworth, Buckner.
- Hollingsworth, C R
- Hollingsworth, C S
- Hollingsworth, G. R.
- Hollingsworth, Josephine
- Hollingsworth, Lea
- Hollingsworth, Marian
- Hollingsworth, Pete M
- Hollingsworth, Peter
- Hollingsworth, Teresa N
- Hollington, Lauren M
- Hollingworth, Neville T J
- Hollingworth, R M
- Hollingworth, T
- Hollins, David.
- Hollinshead, Martha H
- Hollis, Chris
- Hollis, Chris J
- Hollis, D
- Hollis, David
- Hollis, G
- Hollis, Greg
- Hollis, J D
- Hollis, Julian D
- Hollis, Kathy
- Hollister Seed Co.
- Hollister, C
- Hollister, Gloria. 1900-1988
- Hollister, John Edward.
- Hollister, N. (Ned), 1876-1924
- Holloman, Regina E., 1931-
- Holloran, Matthew J.
- Hollós, László, 1859-1940
- Holloway Seed and Floral Co. (Firm : Dallas, TX)
- Holloway Seed and Grain Co.
- Holloway Seed and Grain Company.
- Holloway, Benjamin, approximately 1691-1759
- Holloway, D J
- Holloway, David J
- Holloway, E.
- Holloway, Edward Stratton, 1859-1939
- Holloway, G A
- Holloway, G J
- Holloway, G. T.
- Holloway, Gage T.
- Holloway, Graham J
- Holloway, J D
- Holloway, J D
- Holloway, J K
- Holloway, Jeremy D
- Holloway, L
- Holloway, Patricia.
- Holloway, Ralph L.
- Holloway, S J
- Holloway, T. E. (Thomas Edmunds), 1886-
- Holloway, Teresa
- Holloway, Thomas, 1748-1827
- Holloway's Dream Garden.
- Hollowed, Ed.
- Hollowell, E. A. (Eugene Amos)
- Hollowell, V C
- Hollowell, Victoria C. (Victoria Catherine)
- Hollrung, M. (Max), 1858-1937
- Hollunder, Christian Fürchtegott, 1791-1829
- Hollway, H C Schunke
- Hollwedel, Werner
- Holly Bluff Gardens,
- Holly Haven, Inc.,
- Holly Walker
- Holly, L.
- Holly, Richard Warren.
- Holly-By-Golly,
- Hollycroft Gardens.
- Hollyfield, T P
- Hollyoake, Alyssa L.
- Hollywood Farms.
- Hollywood Gardens.
- Holm & Olson,
- Holm & Olson.
- Holm, Carl Otto.
- Holm, D G
- Holm, E R
- Holm, Eigil
- Holm, Erik
- Holm, Erling
- Holm, Erling 1950-
- Holm, F
- Holm, G O
- Holm, Gert T
- Holm, Gustav Frederik, 1849-1940
- Holm, K