Matti Yrjänä Joensuu was a Finnish writer of crime fiction. He has been awarded the State's Literature Prize (1982), Vuoden johtolanka prize, and he has been nominated for two Finlandias. He received the Martin Beck Award in 1987.
Maturin Murray Ballou was a writer and publisher in 19th-century Boston, Massachusetts. He co-founded Gleason's Pictorial, was the first editor of the Boston Daily Globe, and wrote numerous travel books and works of popular fiction.
Maturinus Veyssière La Croze was in his early years a learned French Benedictine historian and orientalist. Later, as a Protestant convert, he became royal librarian and professor of the University of Berlin Armenologist.
Matvei Petrovich Bronstein was a Soviet theoretical physicist, a pioneer of quantum gravity, author of works in astrophysics, semiconductors, quantum electrodynamics and cosmology, as well as of a number of books in popular science for children.
Matvei Vasilyevich Golovinski was a Russian-French writer, journalist and political activist. Critics studying The Protocols of the Elders of Zion have argued that he was the author of the work. This claim is reinforced by the writings of modern Russian historian Mikhail Lepekhine, who in 1999 studied previously closed French archives stored in Moscow containing information supporting Golovinski's authorship. Back in the mid-1930s, Russian testimony in the Berne Trial had linked the head of Russian security service in Paris, Pyotr Rachkovsky, to the creation of The Protocols.
Count Matvey Alexandrovich Dmitriev-Mamonov - was a Russian figure of public life and writer, organiser and chief of the Mamonov regiment during the Napoleonic wars, major general (1813), and founder of the pre-Decembrist Russian Order of Chivalry. He held a considerable estate, including the manor Dubrovitsy near Moscow. In 1825 he refused the oath to Tsar Nicholas I and was declared insane. For the rest of his life he stood under trusteeship at Vassilyevskoye manor, which became known as Mamonov's Dacha.