English to Chinese Other Linguistics

Please, give me the equivalent in your language of the "every Tom, Dick and Harry" thing. I need to know how you call "mister anybody", a person whose name you don't and won't remember, an insignificant, average person (or more of them)! And what I need are personal names that replaces that "anybody": like Fulano y Mengana (Spanish), Caio, Tizio e Sempronio (Italian), etc.
And, may I ask you to write me down the names in Latin characters?
Thanks!