- Mr.Dillinger
- Molly
- Mochie Minute
- Mr Feathers
- Mike
- Mimosa
- Maddy Jae
- Millie Mae
- Meeko
- Melek
- Music
- Mister
- Mikki
- Minnesota
- Monkey Cakes
- Madie
- Meg
- Maggie Mae
- Minibuns
- Maxie
- Max
- Max a Million
- Micki
- Megabite
- Melony
- Mojo
- Mukluk
- Micah
- Melville
- Mackenzie
- Mariah
- Mirage
- Mystique
- Mossimo
- Mr.Boring
- Munchkin
- Mozley
- Muttley Bob
- Morvinia
- Magnum
- Mazkaa (cheeky devil)
- Mandy
- Mr. “G”
- Marco
- Maxwell
- Melonie
- Maenad
- Minos
- Mouth
- Mablene
- Miss Priss
- Minnou
- Mona
- Matao
- Makovsky
- Macaffity
- Magic
- Maisy
- Malloo
- Malu
- Man
- Marfield
- Marigold
- Mark Anthony
- Machop
- Moltres
- Monroe
- Monster Bones
- Moo Cow
- Mowgli
- Mr. E (mystery)
- Mr. Meow
- Mr. Smith
- Mrs. Mime
- Ms. Confused
- Muffet
- Manson
- Mitchell
- Motley
- Mangles
- Megabird
- Madeline (Maddie)
- Milly
- Mulder
- Mama Kitty
- Missy
- Moca
- Maggie
- Muffie
- Mikey
- Molley
- Muffin
- Mayko
- Ming
- Murphy
- Marvin
- Muffy
- Maddy
- Marihya
- Morris
- Midori
- Mitzy
- Moonshadow
- Midnight
- Mirri
- Midas
- Mardi Gras
- Masquerade
- Monty
- Midgy
- Misfit
- Makari
- Melanie
- Myta
- MacCoy
- Mana
- Mascara man
- Mokey
- Miles
- Mac
- Macy
- Miss Thang
- Midget
- Meleager
- Muse
- Muttly
- Malachy
- Mouth Piece
- Mowee
- Mina
- Mickey
- Meowth
- MC
- Mean Cat
- Meecho
- Michka
- Mieko
- Mischief
- Molsyn
- Mysti
- Mewto
- Mewtwo
- Midnight
- Miffle
- Milkdud
- Millinia
- Mingus
- Miyah
- Moby
- Moby Dick
- Mystee
- Mystery
- Mr. Keet
- Ms. Keet
- Mozart
- Mitsy
- Maynerd
- Misty
- Melody
- Merlin
- Miche
- Meesha
- Major
- Mo (for Morgan)
- Moe
- Ms Kitty (Miss Kitty)
- Maya
- Minou
- Magnus
- Madison
- Maiden
- Maayo (good)
- Myster
- Moonshine
- Moonchine
- Majestic
- Maude
- Matilda
- Mia
- Mittens
- Mickey Mouse
- Mango
- Mons
- Mosiac
- Mahalia
- Mortisha
- Moose
- Matrix
- Mercedes
- Mya
- Marcus
- Milo
- Marbles
- Megan
- Matsi (matzey)
- Magdich
- Macie
- Moany
- Moonbeam
- Mida
- Mocha
- Mable
- Maggoo
- Min-Min
- Mimi
- Meathead
- Muffit
- Magmar
- Moogy
- Moppett
- Mopsy
- Mr. Jones
- Muffy
- Muppie
- Mustafa
- Malibu
- Mankey
- Marmalade
- Maverick
- Maverick
- Meatball
- Meiolania
- Metos (Me Toes)
- Mew
- Munchkins
- Midnigt
Great M Names For Your Cat
