- Marcus, Adolphi.
- Marcus, Ahron, 1843-1916
- Marcus, Benjamin D
- Marcus, Bernard A
- Marcus, Ernst 1893-1968
- Marcus, Eveline d. B.-R. (Eveline Du Bois-Reymond)
- Marcus, H
- Marcus, J
- Marcus, Jeffrey F
- Marcus, Jeffrey M
- Marcus, John R.
- Marcus, Leslie Floyd, 1930-2002
- Marcus, Michael D.
- Marcus, Nancy H
- Marcus, Sidney O.
- Marcus, Siegfried
- Marcus, Steven R.
- Marcus, Stuart J
- Marcus, Tamar
- Marcus, Theodor Ricardo
- Marcus, W Andrew
- Marcusen, Johann.
- Marcusen, M J
- Marcuson, Patrick E.
- Marcussen, William H.
- Marcusso, Gabriel
- Marcusso, Paulo Fernandes
- Marcuzzi, G
- Marcuzzi, Giorgio
- Marcy, Barton C
- Marcy, D Elizabeth
- Marcy, Henry O. (Henry Orlando), 1837-1924
- Marcy, Lorenzo J
- Marcy, Oliver, 1820-1899
- Marcy, Randolph B. (Randolph Barnes), 1812-1887
- Marcy, William L. (William Learned), 1786-1857
- Marcysiak, K
- Marczak, Dawid
- Marczak, Laurie B.
- Mardegan, S.F.
- Mardegan, Silvia Fernanda
- Marder, Elisangela
- Mardero, Sofía
- Mardini, Lúcia Beatriz
- Mardon, David N.
- MArdon, Karine
- Mardones Poblete, Cristian
- Mardones, Alfonso
- Mardones, Cristian
- Mardones, Daniela
- Mardones, Jorge I
- Mardones, María
- Mardones, Melissa
- Mardones, Sofía
- Mardorf, W
- Mare, Rocco A. Di
- Mare, Rocco Alfredo Di
- Maréchal, Nicolas, 1803
- Maréchal, Patrick
- Marechal, Paul
- Maréchal, Sylvain, 1750-1803
- Marecos, Ángel
- Maree, Louis
- Marees, Pieter de.
- Mareggiani, Graciela
- Mareike Evers, Paula
- Marek, József, 1868-1952
- Marek, Paul
- Marek, Paul E.
- Marelli, Carlos J
- Marelli, D C
- Marelli, Dc
- Marelli, Silvia E.
- Marenco, Ricardo A.
- Marenco, Ricardo Antonio
- Marenghi, Giovanni.
- Marengo, Giacomo
- Marengo, José A
- Marengo, José A.
- Marengo, Norman P
- Marengoni, E.
- Marenzeller, Emil von, 1845-1918
- Marenzi, Adriano W. C.
- Marenzi, Paolo
- Marenzi, Rosemeri Carvalho
- Mares Arreola, Oscar
- Marès, H
- Marès, M Paul
- Mares, Michael A.
- Marès, Paul
- Mares, Ruben,
- Marescaux, Jonathan
- Marescotti, Giorgio, fl 1563-1601
- Maresova, Jana
- Marett Farm and Seed Co.
- Marett Farm and Seed Company.
- Marett, Keels W.
- Marett, R. R. 1866-1943
- Marey, Etienne-Jules, 1830-1904
- Marey, M
- Marfetán, Jorge Ariel
- Marfleet, Frederic C.,
- Marfull, Reinaldo
- Margabandhu, V
- Margain-Hernandez, R
- Margalef López, Ramón
- Margalef-Mir, R
- Margalida, A
- Margalida, Antoni
- Margalitadze, Ana
- Margara, J
- Margaret Cousins (Firm),
- Margaret Ilgenfritz (Firm),
- Margaret Ilgenfritz Orchids,
- Margaret Ilgenfritz,
- Margaret Kelly
- Margaret Norton (Firm)
- Margareta, Crown Princess of Sweden, 1882-1920
- Margaría, Cecilia B.
- Margarido, Tereza Cristina Castellano
- Margarido, Vladimir Pavan
- Margaritoulis, Dimitris
- Margelli, Alessandro
- Margetts, B M
- Marggi, Werner
- Marggraf, Georg, 1610-1644
- Marggraf, Rainer
- Margilis, Leo
- Marginson, Julie C
- Margiotta, Francesca
- Margis-Pinheiro, Márcia
- Margitta, Margaret
- Margittai, Antal.
- Margó, T
- Margo, Theodor
- Margolies, David C
- Margolin, Louis.
- Margolis, L
- Margolis, L., 1927-
- Margonska, H B
- Margonska, Hanna B
- Margot, A
- Margraf, A.
- Margraf, J
- Margraf, Nicolas
- Margres, Mark J.
- Marguerier, Janine
- Marguerite R. Clarke (Firm)
- Margueritescu, Simona
- Margueritte, Auguste
- Marguet, Emilio
- Margules, Chris
- Margules, Max
- Margulies, Cecile
- Margulis, Lynn
- Margulis, Susan
- Marhabaie, Mohammad
- Marhold, K
- Marhold, Karol
- Mari Mutt, José A.
- Mari, Marisa
- Marí, Noemí R
- Marí, S M
- Maria
- Maria I, Queen of Portugal, 1734-1816
- Maria I, Queen of Portugal, 1750-1816
- Maria Cecilia Martins Kierulff
- María Celeste, Silvestri
- Maria Da Silveira De Lima, Joenny
- Maria Guarino, Fabio
- Maria Harriet Arnold 1861-1934
- Maria Mitchell Association.
- Maria Rubio, Rosa
- Maria, consort of Humbert II, King of Italy, 1906-
- María, Domigo Víctor Santa
- María, Domingo V Santa
- María, Domingo Victor Santa
- Maria, Fabrício de Souza
- Maria, Heller Karl
- Maria, Marjan
- Maria, Munawar
- Maria, Polzonetti-Magni Alberta
- Maria, Suzanne Lúcia Silva de
- Maria, T. A.
- Maria, Tatiana Fabricio
- Maria, TF.
- Mariaca Méndez, Ramón
- Mariaca, R
- Mariager, Peder, 1827-1894
- Mariam, Adeoba
- Marian, Franca
- Marian, José Eduardo Amoroso Rodriguez
- Marian, M
- Marianelli, Leonardo
- Mariangel, Camila
- Mariani, Celestina
- Mariani, Christopher L.
- Mariani, E
- Mariani, Ernesto
- Mariani, Flaminia
- Mariani, G
- Mariani, M
- Mariani, Maria Antonietta
- Mariani, Mauro
- Mariani, Roxana
- Mariano A., Mauro.
- Mariano Macieira, Raphael
- Mariano Neto, Eduardo
- Mariano, C
- Mariano, Cléa S. F.
- Mariano, Dante Luís Silva
- Mariano, José Roberto
- Mariano, Mauro
- Mariano, Rebeca G. G. Calaça
- Mariano, Rodolfo
- Mariano, Rodolfo
- Mariano, Sandra Maria Botelho
- Mariano, Vanessa
- Mariano, Vladimir
- Mariano-Jelicich, Rocío
- Mariante, Fátima L. F.
- Mariappan, T
- Mariath, Jorge E A
- Mariath, Jorge Ernesto de Araújo.
- Mariaux, A
- Mariaux, Alain
- Mariaux, Jean
- Marić, Ana
- Maric, Dragica
- Marić, Luka
- Marichal Arbona, Evelyn
- Marichal, Raphaël
- Marici, Claudio
- Maričić, Marko
- Marico Nurseries,
- Maricopa County (Ariz.). Commission of Immigration
- Maridass, M
- Maridet, Olivier.
- Maridueña, Gabriela
- Marie
- Marie Kruse (Firm),
- Marie, Pierre
- Marie, René
- Marie-Luce Akossiwoa, Quashie
- Marien, D
- Marien, Daniel, ornithologist.
- Marien, Daniel, ornithologist.
- Marien, J. G.
- Mariette, Jean (Parijs)
- Mariette, Pierre-Jean, 1694-1774