- Haro, José A.
- Haro, José G
- Haro, Roger J
- Haro-Castellanos Jorge
- Haro-Galván, Paulo Sergio
- Haroitt, Edward
- Harold B. Higgins (Firm)
- Harold E. Janes (Firm)
- Harold E. Wolfe (Firm),
- Harold Hall Australian Expeditions 1962-1970
- Harold Hornor (Firm)
- Harold Keays Seed Co.
- Harold L. Codner (Firm),
- Harold Lyke (Firm)
- Harold Stearns (Firm)
- Harold, A S
- Harold, Antony S
- Harold, Catherine E., 1957-
- Harold, Edgar von, 1830-1886
- Harold, G
- Harold, Greg
- Harold, K
- Harold, Laura B. (Laura Brink)
- Harold, N
- Harold, St John
- Haron, N W
- Haron, Noorma Wati
- Haro-Preciado, Hugo J
- Harosi, F I
- Hárosi, Ferenc I.
- Haroun, Ricardo
- Haroun, Ricardo J
- Harouna, Abdoulaye
- Harp, Cyrus R
- Harp, James A
- Harpal, Saiesha
- Harpaz, I.
- Harpeck, K.
- Harpel, Judith A
- Harpel, Judith A S
- Harpel, Judith,
- Harper & Brothers,
- Harper Viola Gardens.
- Harper, A B
- Harper, A V
- Harper, A. E.,
- Harper, A. M. (Alexander Maitland), 1926-
- Harper, Alan G.
- Harper, Arthur Frederick Alan
- Harper, B C S
- Harper, C W
- Harper, Charles Alan, 1942-
- Harper, Charles G. (Charles George), 1863-1943
- Harper, Craig A
- Harper, D A T
- Harper, D E
- Harper, Dat
- Harper, David A T
- Harper, E M
- Harper, E T
- Harper, Elizabeth K
- Harper, Elizabeth M
- Harper, Eugene Howard.
- Harper, F
- Harper, F A
- Harper, Francis
- Harper, Francis P. (Francis Perego), 1856?-1932
- Harper, Francis, 1886-1972
- Harper, G H
- Harper, G W
- Harper, J
- Harper, J A
- Harper, J F
- Harper, J T
- Harper, J. N.
- Harper, James Arthur, 1916-
- Harper, John A.
- Harper, John Russell, 1914-1983
- Harper, John,
- Harper, John, F. R. S. S. A.
- Harper, John.
- Harper, K A
- Harper, K T
- Harper, K. T.
- Harper, Kimball T
- Harper, L F
- Harper, L H
- Harper, Lee
- Harper, Lee H
- Harper, Lee H.
- Harper, Liz
- Harper, Lynsey R.
- Harper, Merritt W. (Merritt Wesley), 1877-
- Harper, Michael W.
- Harper, P P
- Harper, Pierre-Paul
- Harper, R L
- Harper, R M
- Harper, R W
- Harper, R. B.
- Harper, Renee
- Harper, Review By: Roland M
- Harper, Robert A
- Harper, Robert Almer, 1862-
- Harper, Roland M
- Harper, Roland M. (Roland McMillan), 1878-1966
- Harper, S L
- Harper, Samuel A. (Samuel Alain), 1875-
- Harper, Sarah
- Harper, Simon
- Harper, Sylena R
- Harper, Thomas A.
- Harper, Thomas, 1656
- Harper, V. L. (Verne Lester), 1902-1997
- Harper, W R
- Harper, W. M. Warner.
- Harper, Walter R
- Harper, William R.
- Harper, Wm. Warner.
- Harpers Ferry Center (U.S.)
- Harpers' Seeds.
- Harpestraeng, Henrik, approximately 1164-1244
- Harpham Brothers Company.
- Harpke, Alexander
- Harpke, Doerte
- Harpley, Paul
- Harpole, Lisa.
- Harpole, Tom.
- Harpootlian, Phillip J
- Harpum, J
- Harqitt, Edward
- Harrach, A
- Harrach, George H.
- Harradence, Rita Harriet
- Harrah, Ezra Clarence, 1889-
- Harrand, Leonel
- Harrap, Frank
- Harrap, S C
- Harrap, Simon
- Harrel, Annette E.
- Harrel, R C
- Harrell, Annette E.
- Harrell, B E
- Harrell, Byron Eugene.
- Harrell, Destin.
- Harrell, E. A.
- Harrell, E. A. (Edsel Aurburn), 1924-
- Harrer, Georg Albrecht.
- Harri, Mikko
- Harriaran, G N
- Harrich, Christoph,
- Harriden, T D
- Harries, D N
- Harries, Hinrich
- Harriet Bradner (Firm)
- Harriet McGregor (Firm)
- Harrigan, June F
- Harrigan, Natasha
- Harrigan, W R
- Harriman Alaska Expedition 1899-
- Harriman, Edward Henry, 1848-1909
- Harriman, Martha O.
- Harriman, N A
- Harriman, Neil A
- Harriman, Vanessa B.
- Harring, H K
- Harring, H. K.
- Harring, Harry K
- Harrington, A.J.
- Harrington, Ana
- Harrington, B A
- Harrington, B J
- Harrington, B Jane
- Harrington, B. A.
- Harrington, B. A.,
- Harrington, B. Jane.
- Harrington, Bernard J. 1848-1907
- Harrington, Bob
- Harrington, Brian A
- Harrington, C. R.
- Harrington, D J
- Harrington, Daniel F
- Harrington, E.W.
- Harrington, F A
- Harrington, Fred H.
- Harrington, G T
- Harrington, George L. (George Leavitt), 1883-1972
- Harrington, George Leavitt, 1883-
- Harrington, George T. (George Traver), 1885-
- Harrington, H D
- Harrington, H.
- Harrington, Heather
- Harrington, J. B.
- Harrington, Jane E
- Harrington, John Peabody.
- Harrington, Lauren
- Harrington, M
- Harrington, M. R. (Mark Raymond), 1882-1971
- Harrington, Mark
- Harrington, Mark W.
- Harrington, Michael G.
- Harrington, Michael.
- Harrington, Nyra G
- Harrington, Nyra J
- Harrington, Paul.
- Harrington, Richard
- Harrington, Richard C
- Harrington, Robert J.
- Harrington, Robert W
- Harrington, Robert Whiting Jr.
- Harrington, Selga
- Harrington, Susan A
- Harrington, T C
- Harrington, W
- Harrington, W H
- Harrington, Willard Brown.
- Harriot, S C
- Harriot, Samuel C
- Harriott, Vicki
- Harris Gardens.
- Harris Nurseries.
- Harris Seed & Floral Company.
- Harris Seed and Floral Co.
- Harris Seed Company (San Diego, Calif.)
- Harris Seed Company.
- Harris, A C
- Harris, A G
- Harris, A H
- Harris, A M
- Harris, A. S.
- Harris, A. W. (Abram Winegardner), 1858-1935
- Harris, AJ
- Harris, Akira
- Harris, Alan
- Harris, Alex
- Harris, Alexander, 1827-
- Harris, Allan G. 1960-
- Harris, Andrew T
- Harris, Annique
- Harris, Anthony C
- Harris, Arthur
- Harris, Arthur W.
- Harris, Augustus Samuel, 1843-
- Harris, C Max
- Harris, C R
- Harris, C S
- Harris, C. M. (C. Max), 1934-
- Harris, Celeste
- Harris, Charles E.
- Harris, Christine E.