- Maturin, Charles R(obert) (1782-1824) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maturin_charles_r
- Mauclair, Camille; pseudonym of Séverin Faust (1872-1945) (stories)
- See en.wikipedia.org/wiki/Camille_Mauclair
- Maud, Constance Elizabeth (1857-1929) (stories)
- See en.wikipedia.org/wiki/Constance_Maud
- Maude, Cyril (Francis) (1862-1951) (stories) (assoc.)
- See en.wikipedia.org/wiki/Cyril_Maude
- Maude, F(rederic) N(atusch) (1854-1933) (stories)
- See www.oxfordreference.com/view/10.1093/oi/authority.20110803100141157
- Maugham, Robin [i.e., Robert Cecil Romer Maugham, 2nd Viscount Maugham] (1916-1981) (stories) (assoc.)
- See en.wikipedia.org/wiki/Robin_Maugham
- Maughan, Tim (fl. 2010s) (stories) (assoc.)
- See timmaughanbooks.com
- Maule, Ian (1952- ) (stories)
- See fancyclopedia.org/ian-maule
- Maunder, E(dward) Walter (1851-1928) (stories)
- See en.wikipedia.org/wiki/Edward_Walter_Maunder
- Maunsell, Thomas (1839-1937) (stories)
- See maltaramc.com/regsurg/m/maunsellt.html
- Maupassant, (Henri René Albert) Guy de (1850-1893) (stories) (assoc.)
- See en.wikipedia.org/wiki/Guy_de_Maupassant
- Maurice, Arthur B(artlett) (1873-1946) (stories)
- Born in Rahway, New Jersey; educated at Princeton University; editor of The Bookman 1899-1916; newspaper editor.
- Maurice, Frederick (Barton, 1st Baronet) (1871-1951) (stories)
- See en.wikipedia.org/wiki/Frederick_Barton_Maurice
- Mauro, Laura (fl. 2010s) (stories)
- See crunchyblanket.wordpress.com
- Maury, Magruder (Gordon) (1878-1948) (stories)
- Journalist. Born in Philadelphia, Pennsylvania; died in Bethesda, Maryland.
- Maury, Reuben H. (1899-1981) (stories)
- Journalist, editorial writer. Born in Butte, Montana; died in Norwalk, Connecticut.
- Mavity, Nancy Barr (1890-1959) (stories)
- Born in Lawrenceville, Illinois. Crime journalist for California newspaper; living in Oakland in the 1930s.
- Mavor, Elinor ({c}1936- ) (stories) (art) (assoc.)
- See en.wikipedia.org/wiki/Elinor_Mavor
- Mavor, James W(att), Jr. (1923-2008) (stories) (assoc.)
- See www.whoi.edu/main/obituaries/archive?tid=3622&cid=15786
- Mawdsley Graham, Winston [born Winston Grime] (1908-2003) (stories)
- Born Winston Grime (no middle name). He changed his name by deed poll on 2 June 1947, adopting the surname of Mawsely Graham at that time.
- Mawhinney, Pete (fl. 2010s) (stories)
- See www.bookofpete.com/about
- Mawson, Douglas (1882-1958) (stories)
- See en.wikipedia.org/wiki/Douglas_Mawson
- Maxa, Rudy (1949- ) (stories)
- See en.wikipedia.org/wiki/Rudy_Maxa
- Maxim, [Sir] Hiram S(tevens) (1840-1916) (stories) (assoc.)
- See en.wikipedia.org/wiki/Hiram_Maxim
- Maxim, Hudson (1853-1927) (stories)
- Inventor. Born in Orneville, Maine; died in Lake Hopatcong, New Jersey.
- Maximilian I of Mexico [i.e., Fernando Maximiliano José María de Habsburgo-Lorena] (1832-1867) (stories) (assoc.)
- See en.wikipedia.org/wiki/Maximilian_I_of_Mexico
- Maxon, P(ercy) B(urden) (1887-1941) (stories)
- Born in New Brunswick, Canada; died in Detroit; a reporter.
- Maxon, Rex (Hayden) (1892-1973) (stories) (art)
- See pulpartists.com/Maxon.html
- Maxton, James (1885-1946) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_Maxton
- Maxwell, Ann (Elizabeth Lowell) (1944- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maxwell_ann
- Maxwell, Edith M. (fl. 2010s) (stories)
- See edithmaxwell.com
- Maxwell, Elsa (1883-1963) (stories)
- See en.wikipedia.org/wiki/Elsa_Maxwell
- Maxwell, Gerald (1862-1930) (stories)
- Born in London; playwright and play producer; editor of a weekly paper; actor and drama critic.
- Maxwell, Jim (fl. 1970s) (stories)
- Probably editor, writer and journalist James A. Maxwell (1912- ).
- Maxwell, John Alan (1904-1984) (art)
- Born in Roanoke, Virginia.
- Maxwell, W(illiam) B(abington) (1866-1938) (stories) (assoc.)
- Chairman, Society of Authors; Chairman, National Book Council.
- Maxwell, W. Kee (1879-1952) (stories)
- See files.usgwarchives.net/il/peoria/bios/kmaxwell.txt
- Maxwell, William (Keepers, Jr.) (1908-2000) (stories) (assoc.)
- See en.wikipedia.org/wiki/William_Keepers_Maxwell_Jr.
- May, Edna [i.e., Edna May Pettie] (1878-1948) (stories)
- See en.wikipedia.org/wiki/Edna_May
- May, Geoffrey (1900-1964) (stories)
- A barrister, born in Minneapolis, Minnesota, and died in Norton, Massachusetts. Met Ethel Maude Dolbey while they both were students at the London School of Economics.
- May, J(ames) Lewis (1873-1961) (stories)
- See www.oac.cdlib.org/findaid/ark:/13030/kt196nd6gf/
- May, Jacques M(eyer) (1896-1975) (stories)
- See socialarchive.iath.virginia.edu/ark:/99166/w6qk1f56
- May, Julian (Clare) [i.e., Julian Judy May Dikty] (1931-2017) (stories) (art) (assoc.)
- See www.sf-encyclopedia.com/entry/may_julian
- May, Kim (fl. 2010s) (stories)
- See ninjakeyboard.blogspot.co.uk
- May, Margery Land (1898-1932) (stories)
- See www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=14563294
- May, Stella Burke (1877-1961) (stories)
- Author, journalist and explorer. Born in Des Moines, Iowa; died in Georgia (?).
- May, Susan ({c}1960- ) (stories) (assoc.)
- See susanmaywordadventures.blogspot.com.au
- Mayakovsky, Vladimir (Vladimirovich) (1893-1930) (stories)
- See www.sf-encyclopedia.com/entry/mayakovsky_vladimir
- Mayan, Earl Eugene (1916-2009) (stories) (art)
- See pulpartists.com/Mayan.html
- Mayer, Bob [i.e., Robert Mayer] (1959- ) (stories)
- See www.sf-encyclopedia.com/entry/mayer_bob
- Mayer, Douglas W. F. (1919-1976) (stories)
- See fancyclopedia.wikidot.com/douglas-w-f-mayer
- Mayer, Edwin Justus (1897-1960) (stories)
- Born in New York; first in commerce, then reporter on New York newspapers, then press agent for film company, than caption writer.
- Mayer, Frank B. [i.e., Francis Blackwell Mayer] (1827-1899) (stories) (art)
- See en.wikipedia.org/wiki/Francis_Blackwell_Mayer
- Mayer, Henry Hy (1868-1954) (stories) (art) (assoc.)
- See en.wikipedia.org/wiki/Henry_%22Hy%22_Mayer
- Mayer, Martin (Prager) (1928-2019) (stories)
- See en.wikipedia.org/wiki/Martin_Mayer
- Mayer, Robert (1939- ) (stories)
- See www.sf-encyclopedia.com/entry/mayer_robert
- Mayerik, Val (1950- ) (art)
- See en.wikipedia.org/wiki/Val_Mayerik
- Mayers, Dan E. (1922-2014) (stories)
- See www.shakuhachi.com/LL-Mayers.html
- Mayes, Barney (1905?-1978?) (stories)
- Husband of Joan London.
- Mayfield, Earle B(radford) (1881-1964) (stories) (assoc.)
- See en.wikipedia.org/wiki/Earle_Bradford_Mayfield
- Mayhar, Ardath (Frances Hurst) (1930-2012) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mayhar_ardath
- Mayhew, Henry (1812-1887) (stories)
- See en.wikipedia.org/wiki/Henry_Mayhew
- Mayle, Peter (1939-2018) (stories)
- See en.wikipedia.org/wiki/Peter_Mayle
- Maynard, Fredelle Bruser (1922-1989) (stories)
- See www.umanitoba.ca/libraries/units/archives/collections/complete_holdings/ead/html/maynard.shtml
- Maynard, Guy L. (fl. 1920s-1940s) (stories)
- California writer.
- Maynard, Joyce (1953- ) (stories)
- See en.wikipedia.org/wiki/Joyce_Maynard
- Maynard, Lawrance M(arion) (1899-1982) (stories)
- Born in Kansas City, Missouri; died in Hawaii.
- Maynard, Richard Field (1875-1964) (stories) (art)
- See www.aaa.si.edu/collections/richard-field-maynard-papers-7170
- Maynard, Rona (fl. 1960s-2010s) (stories)
- See ronamaynard.com
- Maynard, William Patrick (1971- ) (stories)
- See www.goodreads.com/author/show/2899599.William_Patrick_Maynard
- Mayne, Ethel Colburn (1870-1941) (stories)
- Born in Ireland; educated privately; biographer and novelist.
- Mayne, William (James Carter) (1928-2010) (stories)
- See en.wikipedia.org/wiki/William_Mayne
- Mayne, Winifred (1902-1983) (stories)
- See www.cornellcollege.edu/center-for-the-literary-arts/van-etten-lacey/winifred-van-etten.shtml
- Mayo, Isabella Fyvie (1843-1914) (stories)
- Born in London; her fathers business failed and he died in 1851, and she took responsibility to pay off the debt, working at copying legal documents and addressing envelopes; began publishing poetry in the mid 1860s, later fiction; lived in Aberdeen for most of her writing life and died there.
- Mayo, Katherine (1867-1940) (stories)
- born in Ridgeway, Pennsylvania; critic and essayist.
- Mayo, Wendell (1953-2019) (stories)
- See www.bgsu.edu/arts-and-sciences/english/news/remembering-wendell-mayo.html
- Mayr, Dallas William (1946-2018) (stories)
- See en.wikipedia.org/wiki/Jack_Ketchum
- Mayr, Suzette (1967- ) (stories)
- See www.sf-encyclopedia.com/entry/mayr_suzette
- Mays, Douglas L(ionel) (1900-1991) (stories) (art)
- See www.chrisbeetles.com/artists/mays-douglas-lionel-1900-1991.html
- Mays, Rex (Houston, Jr.) (1913-1949) (stories)
- See en.wikipedia.org/wiki/Rex_Mays
- Mayse, Arthur (William Caswell) (1912-1992) (stories) (assoc.)
- See www.memorybc.ca/mayse-arthur
- Maysi, Kadra (1890-1969) (stories)
- See tellersofweirdtales.blogspot.com/2012/03/kadra-maysi-1890-1969.html
- Mazel, Henry F. (1945- ) (stories)
- Filmmaker, playwright, screenwriter, and therapist.
- Mazer, H. N. (fl. 1960s) (stories)
- Lived in Syracuse, New York.
- Mazet, Horace S. (1903-2002) (stories)
- See www.brownalumnimagazine.com/content/view/1085/40/
- Mazo, Earl (1919-2007) (stories)
- See en.wikipedia.org/wiki/Earl_Mazo
- Mazuk, Harley (1948- ) (stories)
- See www.harleymazuk.com/about-harley.html
- Mazur, Carly Janine (fl. 2010s) (stories) (art) (assoc.)
- See carlyjanine.com
- Mazzini, Giuseppe (1805-1872) (stories) (assoc.)
- See en.wikipedia.org/wiki/Giuseppe_Mazzini
- McAbee, K. G. (fl. 1990s-2010s) (stories)
- See kgmcabee.blogspot.co.uk
- McAdams, T. S. (fl. 2010s) (stories)
- See www.beneath-ceaseless-skies.com/authors/t-s-mcadams
- McAdie, Alexander (George) (1863-1943) (stories)
- See en.wikipedia.org/wiki/Alexander_George_McAdie
- McAfee, David (Gregory) (1989- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/David_G._McAfee
- McAleer, Andrew (1958- ) (stories)
- Son of John (Joseph) McAleeer.
- McAleer, John (Joseph) (1923-2003) (stories)
- Father of Andrew McAleer.
- McAlilly, Alice [born Alice Irene Stewart] (1858-1950) (stories)
- Born in Greenville, Illinois; married Mark McAlilly in 1876 and Frank Chain in 1929; died in Reno County, Kansas.
- McAllister, Angus (1943- ) (stories) (assoc.)
- See www.fantasticfiction.com/m/angus-mcallister/
- McAllister, Bruce (Hugh) (1946- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mcallister_bruce