- Thomas von Cantimpré 1201-1272
- Thomas, de Cantimré, 1201-1272
- Thomas, Hollis A.,
- Thomas, Horace Leroy, 1903-
- Thomas, Howard
- Thomas, Howard H.
- Thomas, Howard, 1943-
- Thomas, Howell W.
- Thomas, Hugh Hamshaw
- Thomas, I. M.
- Thomas, Ivor.
- Thomas, J. A.
- Thomas, J. B.
- Thomas, J. E.
- Thomas, J. H.
- Thomas, J. H. (Entomologist)
- Thomas, J. J. (John Jacobs), 1810-1895
- Thomas, J. M.
- Thomas, J., 19th cent-
- Thomas, Jack Ward
- Thomas, Jacob
- Thomas, James
- Thomas, James A
- Thomas, James Darwin
- Thomas, Janelle L
- Thomas, Janis E.
- Thomas, Jean-Claude
- Thomas, Jenkin, active 1839-
- Thomas, Jennifer C.
- Thomas, Jeremy
- Thomas, Jerome B., 1867-
- Thomas, Joab L.
- Thomas, Jocelyn Parker
- Thomas, John Hunter, 1928-1999
- Thomas, John Sewell
- Thomas, Joseph
- Thomas, Joseph B. (Joseph Brown), 1879-1955
- Thomas, Joseph James.
- Thomas, Jules, active 1841-1852
- Thomas, Justin R.
- Thomas, K. K.
- Thomas, K. Raju
- Thomas, Kaleb J.,
- Thomas, Kate
- Thomas, Katherine M.
- Thomas, Kathryn
- Thomas, Kelly
- Thomas, Kiran
- Thomas, L.
- Thomas, Laurent
- Thomas, Le Marchant
- Thomas, Leonard A
- Thomas, Levi M. (Levi Morton), 1888-
- Thomas, Lilian A.
- Thomas, Linda
- Thomas, Linda A
- Thomas, Lowell P.
- Thomas, Lyell J
- Thomas, M. C. (Michael Charles), 1948-
- Thomas, M. Jared
- Thomas, M. K.
- Thomas, Margaret
- Thomas, Margaret G.
- Thomas, Martin L. H.
- Thomas, Mary Beth
- Thomas, Mason B.
- Thomas, Matthew R.
- Thomas, Meike & Frank Glaw.
- Thomas, Melissa L.
- Thomas, Micheli C.
- Thomas, Mike C
- Thomas, Mrs Rose Haig
- Thomas, N. D.
- Thomas, N. Wiley
- Thomas, Nancy J. (Nancy Jeanne), 1948-
- Thomas, Natalie
- Thomas, Neil D.
- Thomas, Nesta
- Thomas, Nikky M.
- Thomas, O. S.
- Thomas, Oldfield, 1858-1929
- THOMAS, Olivier
- Thomas, Owen D
- Thomas, Owen.
- Thomas, P.
- Thomas, P. D. (Paul Denis), 1935-
- Thomas, Paul
- Thomas, Paul A.
- Thomas, Peter A.
- Thomas, Phil.
- Thomas, Philip
- Thomas, Philippe, 1843-1919
- Thomas, R. Dale
- Thomas, R. G.
- Thomas, R. Glenn
- Thomas, R. J.
- Thomas, R. P.
- Thomas, R. William
- Thomas, Rachel C.
- Thomas, Richard, 1938 May 2-
- Thomas, Rodger
- Thomas, Roger
- Thomas, Roger D. K.
- Thomas, Rose Fay, 1852-1929
- Thomas, Rose Haig
- Thomas, Roy D
- Thomas, Ruth Harris
- Thomas, S. B.
- Thomas, S. M.,
- Thomas, Sabu K
- Thomas, Sadie A.
- Thomas, Sam
- Thomas, Saturnin.
- Thomas, Shirley B
- Thomas, Sonya
- Thomas, Steven
- Thomas, Steven C.
- Thomas, Suzanne
- Thomas, T. Gaillard (Theodore Gaillard), 1832-1903
- Thomas, Theodore George, 1851-
- Thomas, Thomas Henry, 1839-1915
- Thomas, Trudy.
- Thomas, V. P.
- Thomas, Vernon G.
- Thomas, W S
- Thomas, W. L.
- Thomas, W. W.
- Thomas, Walter V., Mrs.
- Thomas, Warren D
- Thomas, William
- Thomas, William Andrew, 1883-
- Thomas, William Beach, Sir, 1868-1957
- Thomas, William S., 1858-
- Thomas, William Sturgis, 1871-1941
- Thomas, William Wayt
- Thomas-Cabianca, Arianna
- Thomason, John
- Thomason, Teresa.
- Thomasos, F. I.
- Thomassin, Bernard A.
- Thomasson, G.
- Thomasson, Joseph R
- Thomasson, M.
- Thomasson, Marc
- Thomas-Stanford, Charles, 1858-1932
- Thomasville Nurseries.
- Thomasville Plant Co.
- Thomasville Plant Company.
- Thomasville Seed Company.
- Thomaz, Andréa T.
- Thomaz, C. M.
- Thomaz, Erika Barbara Abreu Fonseca
- Thomaz, S. M. (Sidinei Magela)
- Thomazini, Marcílio José
- Thome, Darrin M.
- Thomé, José Willibaldo
- Thome, Kaye H
- Thomé, Marcos L.
- Thomé, Maria Tereza C.,
- Thomé, Maria Tereza Chiarioni
- Thomé, N.
- Thomé, Otto W. (Otto Wilhelm), 1840-1925
- Thomé, Otto Wilhelm, 1840-
- Thomé, Ralph G.
- Thomer, Andrea
- Thomerson, Jamie E.
- Thomé-Souza, Mario J. F.
- Thominot, Alexandre
- Thomlinson, John R
- Thommasen, H.
- Thommasen, Harvey Victor, 1957-
- Thommen, Gustave
- Thommen, Heinrich
- Thomopoulos, A.
- Thompson , Donald C.
- Thompson and Hedges.
- Thompson and Norris Co.
- Thompson Bros.
- Thompson Bros. Co.
- Thompson Bros. Company.
- Thompson Farfán, Rabindranath Manuel
- Thompson Nurseries,
- Thompson Nursery (Waco, Tex.)
- Thompson Vineyards,
- Thompson Yates and Johnston Laboratories.
- Thompson Yates Laboratories.
- Thompson, A
- Thompson, A Richard
- Thompson, A. E.,
- Thompson, A. H. 1839-1906
- Thompson, A. L.
- Thompson, A. P.
- Thompson, Aileen C.
- Thompson, Alastair M.
- Thompson, Allen W.
- Thompson, Alton Howard, 1849-1914
- Thompson, Amanda D. Roberts.
- Thompson, Amy B.
- Thompson, Amy K
- Thompson, Andrew, 1894-
- Thompson, B. G. (Benjamin Garrison), 1891-
- Thompson, B. R.
- Thompson, Ben H. (Benjamin Hunter), 1904-
- Thompson, Benjamin, 1776?-1816
- Thompson, Bernard H.
- Thompson, Bertrand J.
- Thompson, Bill
- Thompson, Bon.
- Thompson, Bruce Alan, 1946-2007
- Thompson, Bruce Carlyle, 1949-
- Thompson, Bruce E.
- Thompson, C.
- Thompson, C. H.
- Thompson, C. H.
- Thompson, C. J. S. (Charles John Samuel), 1862-1943
- Thompson, C. R.
- Thompson, Cameron
- Thompson, Carl W. (Carl William), 1879-
- Thompson, Caroline Burling
- Thompson, Catherine R
- Thompson, Charles F
- Thompson, Charles Henry, 1870-1931
- Thompson, Charles W
- Thompson, Charles.
- Thompson, Chase E.
- Thompson, Christian
- Thompson, Clarence Garrison, 1918-
- Thompson, Cody W.
- Thompson, Crystal
- Thompson, D. C.
- Thompson, D. J.
- Thompson, Dale Layne.
- Thompson, Daniel B.
- Thompson, Daniel Q.
- Thompson, D'Arcy Wentworth, 1860-1948
- Thompson, David H. (David Hiram), 1897-1965
- Thompson, David Hiram, 1897-
- Thompson, David J
- Thompson, Don
- Thompson, Donald R
- Thompson, E John
- Thompson, E O P
- Thompson, E. H. (Edmund Harry), 1891-1924
- Thompson, E. H. (Edward Herrmann), 1887-
- Thompson, E. J.
- Thompson, Edna Old
- Thompson, Edward F.
- Thompson, Edward Henry
- Thompson, Edward Herbert, 1860-1935
- Thompson, Edward Maunde, Sir, 1840-1929