Keniver folen gans an rager
- M
- M. C. Gainey
- M. R. James
- Mabinogi
- Machiko Ono
- Machynlleth
- Macon, Jeorji
- Madagascar (fylm)
- Madagaskar
- Madeira
- Madison, Wisconsin
- Madrid
- Madrid (kemmynieth omrewl)
- Maenclochog
- Maenorbŷr
- Maentwrog
- Maerun
- Maes-car
- Maes-y-cwmwr
- Maesteg
- Maesyfed
- Maeve Binchy
- Magdeburg
- Maggie O'Farrell
- Maggie O'Neill
- Magid Magid
- Magnesiom
- Magnús Scheving
- Mahathir Mohamad
- Mahatma Gandhi
- Mahershala Ali
- Mahomm
- Mahunyes
- Mahābhārata
- Mai al-Kaila
- Maidstone
- Mainz
- Make Mine Music
- Makedonek
- Malabo
- Malawi
- Malaysi
- Malcolm Bradbury
- Malcolm Hulke
- Malcolm Lowry
- Malcolm in the Middle
- Maldivys
- Mali
- Malmö
- Malpas
- Malta
- Malu Mader
- Malus
- Mamba du
- Mamm Veur an Dhuwow
- Mamoth
- Manafon
- Manakish
- Manat an Azerbayjan
- Manawydan mab Lyr
- Manchester
- Manchester, Hampshire Nowydh
- Mandy Patinkin
- Manganes
- Manitoba
- Manordeifi
- Manowek
- Mao Zedong
- Map nep Dama – an Whethel Ingrid
- Maqluba
- Maranhão
- Marathon
- Marbel
- Marcel Proust
- Marche
- Marchwiail
- Marcia Wallace
- Marco Polo
- Marco Rubio
- Marcus Valerius Martialis
- Margam
- Margaret Ewing
- Margaret Steuart Pollard
- Margaret Thatcher
- Margery Kempe
- Margh
- Margh Kynver
- Marghas Owr Gaza
- Marghasyow
- Marghkell
- Marghsylli
- Margot Fonteyn
- Margot Kidder
- Margot Robbie
- Margven
- Marhek (edhen)
- Maria I a Bow Sows
- Maria Wynn
- Marian
- Marian Keyes
- Mariano Rajoy Brey
- Marie Curie
- Mariehamn
- Marijampolė
- Marillion
- Marilyn Monroe
- Marine Le Pen
- Mario Bava
- Mario Draghi
- Marjorie Estiano
- Mark Dindal
- Mark Drakeford
- Mark Durkan
- Mark Fisher
- Mark Hamill
- Mark McManus
- Mark Rutte
- Mark Twain
- Mark Zuckerberg
- Markiplier
- Marksydhieth
- Marlene Dietrich
- Marlon Brando
- Marokk
- Marsha Blackburn
- Marsha Hunt
- Marsha P. Johnson
- Martin Amis
- Martin Chuzzlewit
- Martin Freeman
- Martin Heidegger
- Martin Koster
- Martin Landau
- Martin Lawrence
- Martin Luther
- Martin Luther King, Jr.
- Martin McDonagh
- Martin McGuinness
- Martin Van Buren
- Martinik
- Martinsburg, Virjynni West
- Martletwy
- Mary Anderson (deviser)
- Mary Anning
- Mary Eve Mills
- Mary Lou McDonald
- Mary Poppins
- Mary Robinson
- Mary Shelley
- Mary Wolverston
- Maryville, Tennessi
- Masahiro Ito
- Maseru
- Maseth
- Massachusetts
- Massen Wlesik
- Matharn
- Mathri
- Mato Grosso
- Mato Grosso do Sul
- Matsuo Bashō
- Matt Berry
- Matt Hancock
- Matt LeBlanc
- Matt Smith
- Matterhorn
- Matthew Goodwin
- Matthew J. Munn
- Matthew Perry
- Matthew Taylor
- Maud Adams
- Maureen O'Hara
- Mawddwy
- Max Planck
- Max Weber
- Maya Angelou
- Mayfair
- Mayn
- Mayotte
- Mazie Hirono
- Mažeikiai
- McConnellsburg, Pennsylvani
- Meadville, Pennsylvani
- Mebyon Kernow
- Mechell
- Mecklenburg-Vorpommern
- Medellín
- Medhegneth
- Medhoges an gors
- Media, Pennsylvani
- Meeker, Kolorado
- Megan Lloyd George
- Meghan, Dukes Sussex
- Meidrim
- Meifod
- Meiji Restoration
- Meitneriom
- Mejwas
- Mekka
- Meksiko
- Meksiko Nowydh
- Mel
- Melhwioges
- Melilla
- Melindwr
- Melinji (Pluw Beran yn Treth)
- Melinnowydh
- Melionen gemmyn
- Melldrosek
- Mellkeyn
- Mellyonen rudh
- Melody Time
- Memphis, Tennessi
- Men Scone
- Men an Eskob
- Men an Toll
- Men growan
- Men gwandrus
- Men pumys
- Mendeleviom
- Menegesydhieth
- Menek
- Mengleudh Delyow Boll
- Mengleudh Dinorwik
- Mengleudh an Penrhyn
- Menja Tiz Kernuak buz gasowas
- Menkov Donyerth Ruw
- Menowghedh
- Mensa (ranneves)
- Mentrimildir
- Menydh
- Menydh Erebus
- Menydh Everest
- Menydh rew
- Menydhyow Karnek
- Menydhyow an Cuiltheann
- Menyon
- Menzies Campbell
- Mercer, Pennsylvani
- Mergher
- Merher (duw)
- Merher (planet)
- Meridian, Idaho
- Merkuri
- Merlin's Bridge
- Mernans
- Mernans yn Kylgh
- Merseyside
- Merthyr Cynog
- Merthyr Mawr
- Meryasek
- Meryl Streep
- Mesa, Arisona
- Mesker
- Mesopotami
- Mester Prokharchin
- Metaboledh
- Meter
- Metropolis (Romans)
- Meurth (duw)
- Meurth (klerheans)
- Meurth (planet)
- Meyn Eglos
- Mezzo Mix
- Mhairi Black
- Mi'kmaq (yeth)
- Mia Goth
- Miami, Florida
- Michael Biehn
- Michael Caine
- Michael Curtiz
- Michael D. Higgins
- Michael Faraday
- Michael Fassbender
- Michael Foot
- Michael Gough
- Michael Gove
- Michael Heseltine
- Michael Howard
- Michael Jackson
- Michael Jeter
- Michael Lonsdale
- Michael Martin, Baron Martin a Springburn
- Michael Owen
- Michael Portillo
- Michael Sheen
- Michel Houllebecq
- Michelangelo
- Michelle O'Neill
- Michelle Obama
- Michelle Rodriguez
- Michelle Yeoh
- Micheál Martin
- Michigan
- Michoacán
- Mickey Mouse
- Microscopium (ranneves)
- Middleburg, Pennsylvani