Here are some great names for cats which all start with the letter M.
| Mabel | Meagan | Miss Daisy |
| Mac | Meatloaf | Miss Kitty |
| Mackenzie | Medusa | Miss Muffett |
| Mackie | Meg | Miss Piggy |
| Madam | Megan | Missy |
| Maddie | Meggie | Mistletoe |
| Maddy | Meko | Misty |
| Madeira | Mel | Mittens |
| Madeleine | Melvin | Moby |
| Madison | Menace | Moe |
| Maggie | Meoww | Mogli |
| Magic | Mercury | Mojo |
| Mahogany | Mergatroid | Molly |
| Maisy | Merlin | Momma |
| Mama Cat | Messy | Momo |
| Mandarin | Mew-Mew | Monkey |
| Mandrake | Mia | Monty |
| Mandy | Micha | Moonbean |
| Mango | Middles | Moonlight |
| Manny | Midnight | Moonshine |
| Manx | Mike | Moonstone |
| Marbles | Mikey | Morgan |
| Marco | Miki | Morpheus |
| Marcus | Miley | Morse |
| Marge | Milk | Mouser |
| Mariah | Milkface | Mousetrap |
| Marigold | Milkie | Mowgli |
| Marmalade | Milkshake | Mr Smartypants |
| Mars | Milky | Mr Snuggles |
| Marshmallow | Millicent | Mr Tibbs |
| Martha | Millie | Mr Tickles |
| Marvin | Milly | Mr.Bean |
| Matilda | Mimzy | Mr.Cat |
| Matt | Minette | Mr.Cookie |
| Maude | Ming-Ming | Mr.Kat |
| Mavis | Minki | Mr.Kitty |
| Max | Minnie | Mrs Kitty |
| Maxi | Minty | Ms Kitty |
| Maximilian | Mira | Muffin |
| Maxwell | Miracle | Mycroft |
| Maya | Miranda | Mystic Meg |
| Maynard | Mischief | Mystique |
| McKenzie | Mischka |