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- Helbling, E. Walter
- Helbling, Walter
- Helbling, Walter E
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- Held, Anna 1859-1898
- Held, E
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- Heldreich, Theodor von, 1822-1902
- Heldt, Fágner Henrique
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- Helen E., Stoddart
- Helena National Forest (Agency : U.S.)
- Helena National Forest (Mont.)
- Helen's Primrose Gardens.
- Helenurm, Kaius
- Helfer, H
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- Helfer, Johann Wilhelm.
- Helfer, John William
- Helfer, Stephan
- Helfert, M R
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- Helfman, Eugene S
- Helgen, Kristofer M.
- Helgen, Lauren
- Helgen, Lauren E.
- Helgerson, O. T.
- Helgesen, R G
- Helgi Jónsson, 1867-1925
- Helgoland. Biologische Anstalt und das Nordsee-Museum
- Helin, Johannes, 1783-1853
- Hell, P
- Hellack, Jenna J
- Helland, Amund, 1846-1918
- Helland-Hansen, Bjørn, 1877-
- Hellbernd, Ludger
- Hellbom, Per Johan, 1827-1903
- Helldin, Jan Olof
- Helldin, Jan-Olof
- Helle, active 1763-
- Helle, Eero
- Hellebrand, Emil
- Hellebust, Johan A
- Helleiner, Christopher W.
- Helleiner, Frederick M.
- Hellenga's Nursery.
- Hellenius, Carl Niclas
- Hellens, Carl Niclas, Friherre von, 1745-1820
- Hellenthal, Barbara J
- Hellenthal, R A
- Hellenthal, Ronald A
- Helléouët, Marie-Noëlle
- Heller
- Heller Bros.
- Heller Brothers Company.
- Heller, A H
- Heller, Albert Henry, 1866-1906
- Heller, Alfonso H
- Heller, Amos Arthur, 1867-1944
- Heller, Cam. (Camil), 1823-1917
- Heller, Camill(O) (Kamill)
- Heller, Charles
- Heller, E
- Heller, Edmund
- Heller, Edmund, 1875-1939
- Heller, F
- Heller, F R
- Heller, Florian
- Heller, Franz Xaver, 1778-1840
- Heller, Friedrich
- Heller, Friedrich R
- Heller, H M
- Heller, Hilda Hempl
- Heller, Jack Myron, 1943-
- Heller, Julius, 1864-
- Heller, K
- Heller, K G
- Heller, K M
- Heller, Karl Maria
- Heller, K-G
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- Heller, K-M
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- Heller, M
- Heller, Mark P.
- Heller, Richard
- Heller, Robert C.
- Heller, Robert Chester, 1918-
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- Heller, Thomas,
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- Hellgrewe, Rudolf.
- Hellich, Bohuslav.
- Hellier, M
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- Helling, R
- Hellings, Mary Louisa.
- Helliwell, Richard
- Hellman, Milo, 1872-1947
- Hellman, Phillip L
- Hellman, Robert E
- Hellman, Warren
- Hellmann, August.
- Hellmann, Christine
- Hellmann, Moacir E.
- Hellmann, Moacir Edson
- Hellmann, V
- Hellmayer, Charles B
- Hellmayer, Charles E
- Hellmayr, Carl Eduard, 1878-1944
- Hellmayr, Charles E
- Hellmayr, J K
- Hellmich, Walter
- Hellmund, Meinolf
- Hellmund, Winfried
- Hellmuth, Heidi
- Hellot, Jean, 1685-1766
- Hellouet, Marie-Noëlle
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- Hellquist, C B
- Hellquist, C Barre
- Hellquist, C Barry
- Hellquist, C E
- Hellquist, C Eric
- Hellquist, C. Barre
- Hellquist, C. Eric
- Hellriegel, Hermann, 1831-1895
- Hellstrom, J
- Hellung-Larsen, P
- Hellung-Larsen, Per
- Helluy, S M
- Hellwald, Frederich Anton Heller von, 1842-1892
- Hellwald, Friedrich von, 1842-1892
- Hellwig, Christoph von, 1663-1721
- Hellwig, Frank H
- Hellwig, Robert Lee
- Hellwing, S
- Hellwing, Salo
- Hellwing, Shlomo
- Hellyer, R O
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- Helm, CV
- Helm, D. J.
- Helm, F.
- Helm, Henry T.
- Helm, P L
- Helm, R C
- Helm, S R
- Helm, Steven R
- Helm, Theodor, 1810-1875
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- Helme, Nick A
- Helme, W. C.
- Helmer, José Luiz
- Helmers, A. E. (Austin Edward), 1916-
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- Helmholtz, Hermann von, 1821-1894
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- Helminger, Thierry
- Helmlehner, M. G.,
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- Helmreich, James
- Helmrich, Karl, 1833-
- Helms, Carl W
- Helms, Jackson
- Helms, John A
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- Helms, Richard
- Helmstaedt, Herwart
- Helmstedt 1740.
- Helmstedt 1741.
- Helmstedt 1748.
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- Helmuth, William T.
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- Helmy, M A
- Helper, T W
- Helsdingen, P. J. van
- Helsingin Hyönteistieteellinen Yhdistys.
- Helsingin yliopisto. Kasvimuseo.
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- Helton, Nancye
- Heluta, Vasyl P
- Helversen, Otto von, 1943-2009
- Helvetische Societät.
- Helvétius, Jean-Adrien, 1662-1727
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- Helvoort, B. E. van
- Helwig, Christoph, 1642-1690
- Helwig, Johann Christian Ludwig.
- Hely-Hutchinson, G. W.
- Hemachandra, K.S.
- Hemadri, K
- Heman Glass (Firm)
- Heman Glass Seed Co.
- Hemanth, J
- Hembree, Stephen Carson, 1938-
- Hemelrijk, C K
- Hement, Felix
- Hemenway, Ansel F
- Hemenway, Augustus
- Hemenway, Harriet L.
- Hemenway, Henry Bixby, 1856-
- Hemenway, Henry Bixby, 1856-1931
- Hemenway, Herbert Daniel, 1873-
- Hemenway, Robert
- Hemer, M A
- Hémery, Georges
- Hemery, Lenaig
- Hemery, Lenaïg
- Hemeschkal, H
- Hemet Wholesale,
- Hemida, S K
- Heming, Arthur, 1871-1940
- Heming, B S
- Heming, Thomas A.
- Heming, W. E.
- Hemingway Tree Farms.
- Hemingway, Carroll
- Hemingway, G T
- Hemingway, Geo. R.
- Heminway, S W
- Hemkar, R P
- Hemknoll,
- Hemleben, Christoph
- Hemm, Geo.
- Hemm, Verena
- Hemmer, H
- Hemmer, Helmut
- Hemmer, Jörg Pd
- Hemmerich, Cornelius Heinrich,
- Hemmerly, T E
- Hemmes, Don E
- Hemmi, T
- Hemming, Daniel J B
- Hemming, Francis
- Hemming, Walter Edward
- Hemmingsen, A M