M nomenclature (from the IAU and from unofficial sources)

Italics indicate farside features.

Note:
Johann Hewelcke's name Mons Mampsarus is a typographical error. On his chart it is Mons Campsarus.
Note:
- Mandela (the name Mandela or Nelson Mandela International Peace Crater has been proposed for Plana G, in honor of Nelson Mandela, by the Luna Society International, but this has not been approved by the IAU).
Note:
- Mount Marilyn is perhaps the very first one of the NASA-related nicknames (of the Apollo era, Apollo 8 / Apollo 10) to be officially recognized by the IAU (July 2017).

M. Anderson (Michael Phillip Anderson, crewmember STS-107)
-Wilkins- MacDonald (Aristarchus F)
-Menzel, 1971- Mach
-NASA- Mackin (Apollo-17 site)
-Maedler- Maclaurin
-Lee- Maclear
-LTO- Maclear, Fossa
Maclear, Rimae
Maclear 1 (Irregular Mare Patch WNW of Arago E)
Maclear 2 (Irregular Mare Patches SSE of Maclear)
MacMillan
-Hewelcke- Macra, Insula (IAU: Posidonius)
-Riccioli- Macrobius
-Hewelcke- Macrocemnii, Montes (IAU: Atlas and Hercules)
-Birt?- -Schmidt?- Mädler
Madler's Square (unofficial name) (see also Fontenelle Epsilon)
-Hewelcke- Maeotis, Palus (IAU: Mare Crisium)
-Schmidt- Maestlin
Maestlin, Rimae
-Maedler- Magelhaens
-Van Langren- Magini (IAU: Liebig Gamma)
-Riccioli- Maginus
-Gilbert- Magna Occidentalis, Regio (IAU: Mare Fecunditatis, Nectaris, Serenitatis, Tranquillitatis)
-Gilbert- Magna Orientalis, Regio (IAU: Mare Imbrium)
-Van Langren- Magni (IAU: Capella B?)
-Sternberg- Magnitsky (near the IAU's Mach)
-Gilbert- Magnus, Sinus (IAU: between Mare Fecunditatis and Mare Nectaris)
-Birt- Main
-Schroter- Mairan
Mairan, Rima
-Caes- Mairan Tholus (the domelike hillock Mairan T)
-Hewelcke- Major, Insula (IAU: Langrenus)
-Hewelcke- Major Occidentalis, Lacus (IAU: Mare Marginis)
-Hewelcke- Majorca, Insula (IAU: Montes Recti)
-Menzel, 1971- Maksutov
-Riccioli- Malapert
-IAU 2014- Malinkin (in Faustini) (south pole area)
-Schmidt- Mallet
-Hewelcke- Malta, Insula (IAU: Lansberg)
-Schroter- Malvasia (IAU: Schluter)
-Van Langren- Malvezzi (=Malvasia?) (IAU: Byrgius A)
-Menzel, 1971- Malyy
-Hewelcke- Mampsarus, Mons (IAU: Suess, bright area)
-LSI- Mandela / Nelson Mandela International Peace Crater (Plana G)
-Menzel, 1971- Mandel'shtam
-Riccioli- Manilius
Manilius 1 and 2 (fields of Irregular Mare Patches west of Manilius)
-LTO- Mann (Zhiritsky Z)
-Riccioli- Mannae, Terra
-Birt- Manners
-Hewelcke- Mantiana, Palus (dark area SE of Fracastorius)
Manuel (craterlet near Aratus CA, aka "Lorca")
-Riccioli- Manzinus
-Hewelcke- Maraeotis, Palus (IAU: Grimaldi)
-Schroter- Maraldi
Maraldi, Mons
Marcello, Rima (near Mons Argaeus)
-Van Langren- Marci (IAU: Tobias Mayer A)
-Menzel, 1971- Marci
-Van Langren- Marci, S. (IAU: Gassendi A) (Wilkins's Clarkson)
-Maedler- Marco Polo
-Menzel, 1971- Marconi
-Franz- Mare Marginis (Basin)
Marginis Swirl (unofficial name)
-Van Langren- Mariae D. Mont. F. (IAU: Hadley)
-Van Langren- MARIAE Imp. Rom. (IAU: Menelaus)
-Van Langren- Mariannae Imper. F. (IAU: Calippus Alpha)
-J.Lovell, Apollo 8- / -IAU- Marilyn, Mount (Mons)
-NASA- Mariner (Apollo-17 site)
-Hewelcke- Marinus, Lacus (E corner of Mare Imbrium)
-Maedler- Marinus
-Menzel, 1971- Mariotte
-Riccioli- Marius
Marius, Rima
Marius Hills
-NASA- Mark (Apollo-15 site)
-RLA 1963- Markov
-Caes- Markov's triangle (isosceles triangle of 3 craterlets ESE Markov)
-Krieger- Marth
-Van Langren- Martinitzi (IAU: Bettinus)
Mary (craterlet near Mons Argaeus)
-Hewelcke- Masicytus, Mons (IAU: Alphonsus)
-Van Langren- Masii (IAU: Gauricus)
-Van Langren- Masii, Lacus (IAU: Lacus Excellentiae)
-Lohrmann- Maskelyne
Maskelyne IMP ("fried egg" halfway between Wallach and Maskelyne F)
Maskelyne Theta (see Boot Hill)
-Maedler- Mason
-Krieger- Matra (see Carpatus, Montes)
-NASA- Matthew (Apollo-15 site)
-NASA- Mattingly (location unknown, probably on the moon's far side)
-Menzel, 1971- Maunder
-Schroter- Maupertuis
Maupertuis, Rimae
-Hewelcke- Mauritania (regio) (E and N of Sinus Iridum)
-Riccioli- Maurolycus
-Birt- Maury
Mavis (craterlet NW of Mons La Hire)
-Wood- Maw / The Maw (at Mare Pacificus)
Mawson, Dorsa
-Van Langren- Maximiliani Duc. Bava. (IAU: Clavius)
Maxwell
-Schroter- Mayer, F.C. (location unknown)
-Van Langren- Mazarinii (IAU: Alpetragius)
McAdie /
-RP 1097- McAuliffe (crewmember STS-51L)
-Birt- McClure
McCool (crewmember STS-107)
McDonald (aka Wilkins's Porthouse)
-Menzel, 1971- McKellar
-Menzel, 1971- McLaughlin
-Menzel, 1971- McMath
-RP 1097- McNair (crewmember STS-51L)
-Menzel, 1971- McNally
-Menzel, 1971- Mechnikov
-Van Langren- Medicaei (IAU: Bullialdus)
Medii, Sinus (site of Surveyor 4 and Surveyor 6)
-Gilbert- Medilunaria, Insula (IAU: Sinus Medii)
-Gilbert- Medilunarium, Mare (IAU: south of Mare Imbrium)
-Hewelcke- Mediterraneum, Mare (IAU: Mare Imbrium, Mare Nubium, E part Oceanus Procellarum)
-Van Langren- Medius, Sinus (IAU: Sinus Medii)
- Wilkins- Mee
-Menzel, 1971- Mees
-rille seeker- Mees Y, Rima (slightly north of Mees Y)
-Menzel, 1971- Meggers
-Menzel, 1971- Meitner
Melissa (craterlet near Ibn Firnas and Ostwald)
-Schmidt- Melloni (near Billy and Hansteen) (same as Wilkins's Burrell?)
-Hewelcke- Melos, Insula (SE border of Mare Cognitum)
-Menzel, 1971- Mendel
-Caes- Mendel-Lippmann, Vallis (the valley or chain near Mendel and Lippmann)
Mendel-Rydberg Basin
Mendeleev (Basin)
Mendeleev, Catena
-Riccioli- Menelaus
-LTO- Menelaus, Fossae
Menelaus, Rimae
-Hewelcke- Menyx, Insula (bright area at Kunowsky)
Menzel
-Schroter- Mercator
Mercator, Rupes
-Hewelcke- Mercurii, Promontorium (near Aristarchus?)
-Riccioli- Mercurius
-NASA- Mercury (IAU: Heaviside)
-Gilbert- Meridionalis, Continens (IAU: Mare Nubium and environs)
-Hewelcke- Meridionalis, Lacus (dark area SW of Schiller)
-Hewelcke- Meridionalis, Mons (IAU: Bettinus and Kircher)
-NASA- Merriam (Apollo-16 site)
-Menzel, 1971- Merrill /
-Van Langren- Mersenni (IAU: Azophi)
-Riccioli- Mersenius
Mersenius, Rimae
-Menzel, 1971- Meshcherskiy
-Hewelcke- Mesogys, Mons (IAU: Herschel)
-Riccioli- Messala
-Maedler- Messier
Messier A
-LTO- Messier, Fossa
Messier, Rima
-Van Langren- Methonis, Promontorium (NASA: Barbara Mesa)
-Riccioli- Metius
-Riccioli- Meton
-Van Langren- Mexiae (IAU: Reinhold)
-Menzel, 1971- Mezentsev
-Hewelcke- Micale, Mons (IAU: Lalande)
Michael (craterlet in the part of Palus Putredinis known as "Lacus Mozart")
-Van Langren- Michaelis S., Promontorium (IAU: Montes Secchi)
-Wood?- Michelin Man / Bibendum (system of hills east of Gassendi)
-Caes- Michelin Man / Bibendum (tiny craterlet-cluster east of Lansberg)
-Menzel, 1971- Michelson
Michelson (GIRD), Catena
-Peck- Mickey Mouse (trio Fra Mauro-Bonpland-Parry)
-NASA- Middle Crescent (Apollo-12 site)
-Menzel, 1971- Milankovič
-Caes- Milankovic, Vallis (the valley WNW of Milankovic)
-Riccioli- Milichius
Milichius, Rima
-Wilkins- Millas (Parrot C)
-Fauth- Miller (Lexell A)
-Birt- Miller
-Fauth- Miller (Lexell A)
-Menzel, 1971- Millikan
-Menzel, 1971- Mills
-Menzel, 1971- Milne (Basin)
-LTO- Milton (Purkyne S)
-Hewelcke- Mimas, Mons (IAU: probably Mosting)
-Menzel, 1971- Mineur
-Hewelcke- Mingui, Desertum (southern limb area)
-Caes- Mini Egg-in-a-Nest (central peak of Thebit L) (and also Lockyer G)
-Caes- Mini Schiller (between Kirch and Piazzi Smyth)
-Menzel, 1971- Minkowski
-Menzel, 1971- Minnaert
-Hewelcke- Minor, Insula (IAU: Atwood, Bilharz, Naonobu)
-Hewelcke- Minor Occidentalis, Lacus (Hansen B dark area, etc.)
-Hewelcke- Minorca, Insula (IAU: Mons Pico)
-Hewelcke- Miris, Stagnum (IAU: Riccioli O dark spot)
-Rand McNally- Mishqui basin (see Abbot)
-Higgins- Mister Peanut (between Guericke and Kundt)
-NASA- Misty doublet (Apollo-15 site)
-Rand McNally- Mitika peak (Jansen Alpha)
-Lee- Mitchell
-NASA- Mitchell / Mitchell-Apollo (Apollo-17 site)
-Menzel, 1971- Mitra /
Miyamori Valley (unofficial name, see Lohrmann and Riccioli)
-Menzel, 1971- Möbius
-NASA- MOCR (Mission Operations Control Room) (Apollo-17 site)
-Gruithuisen- Moenum (location unknown)
-Hewelcke- Moesia (regio) (northern border of Mare Serenitatis)
-Menzel, 1971- Mohorovicic
-Birt- Moigno
-Menzel, 1971- Moiseev
Moissan (in Mendeleev)
-Van Langren- Moleri (IAU: Baco B?)
-Riccioli- Moletius (Fra Mauro Lambda)
-Krieger- Moltke
-Schmidt- Monge
Monira (craterlet in Alphonsus)
-LTO- Montaigne (south of Wyld J)
-Fauth- Montanari
-LTO- Montesquieu (Hirayama S)
-Menzel, 1971- Montgolfier
-Hewelcke- Montuniates, Mons (IAU: Autolycus)
-Menzel, 1971- Moore
-Wilkins- Moore (Agatharchides A)
-Sternberg- Morehouse (near Ingalls)
-Van Langren- Moreti (IAU: Picard Gamma)
-Riccioli- Moretus
-Lamech- Moreux (Gambart C)
-Van Langren- Morgues (dark spot near Fourier)
-Van Langren- Morini (IAU: Harpalus)
-Riccioli- Morinus (location unknown)
Morley
Moro, Mons (Bonpland Psi in Mare Cognitum)
-Rand McNally- Morotcha (see Mare Vaporum)
-Menzel, 1971- Morozov
-Menzel, 1971- Morse
-Riccioli- Mortis, Lacus
Mortis (Lacus) Fault
-Hewelcke- Mortuum, Mare (IAU: Pitatus dark floor)
Mare Moscoviense (Basin)
-Hewelcke- Moschus, Mons (Catharina, Cyrillus, Theophilus)
-RLA 1963- Moseley
-Maedler- Mösting
-Gaudibert- Mouchez
-Bozic- Mouchez C --- Mouchez L, Catena
-Menzel, 1971- Moulton
-Caes- Moulton, Vallis (the short shallow valley west of Moulton)
-Caes- Moulures (the handcuff-shaped remains of craters in Mare Frigoris)
-Lamech- Moumouris (IAU: Galen)
-Van Langren- Moura (IAU: Cleomedes)
-Wood- Mouse / The Mouse (at Lacus Mortis)
-LTO- (?) Mozart, Lacus (at Palus Putredinis, near Kathleen)
-LTO- Mozart, Rima (at Palus Putredinis, near Kathleen)
-Sternberg- Mozhaisky (IAU: Guthnick)
-NASA- Mueller (location unknown, probably on the moon's far side)
-Riccioli- Mulerius (IAU: Metius)
-Lamech- Müller (Parrot C) (Wilkins's Millas)
-Caes- Muller, Catena (the chain of craters west of Muller)
-Hewelcke- Mundi, Catena (IAU: NW border of Mare Serenitatis)
-Riccioli- Munosius (IAU: Wolf)
-RP 1097- Murakami (aka Egnitis)
-Birt- Murchison
-Riccioli- Mutus
Mutus-Vlacq Basin
-Hewelcke- Myconius, Mons (ray NE from Copernicus)
-Schroter- Mylius (location unknown)
-Lamech- Myriame (Eudoxus A)
-Hewelcke- Mysius, Mons (IAU: Dembowski and Rhaeticus)