Memmy
Memmycat
Memnoch (after the character in Anne Rice's 'Vampire Chronicles')
Memoir
Memphis
Menage
Menchi
Mendle
Mendlesohn
Meneau
Meneki Nikko
Menelao
Mennis
Menolly Jazz
Mental
Mental Case
Meo
Meo Hao
Meouwz
Meow
Meow Meow
Meow Meow Girl
Meow Tse Tounge
Meow Tse-Tung
Meowance
Meower
Meowie
Meowie Face
Meowkis
Meow-mee