Explanations/etymology also appreciated!
For Joe Shmoe, it means a very average or below average person. It’s a derivation of the practice of using “shm-” to dismiss something (eg “Practice shmactice. We’re already perfect”).
And “John Smith” is meant to be the most average name or person imaginable, so they have the “most common” (citation needed) first and last name as well.
In my country (Spanish speaking) we say “Fulano de tal” Fulano is kinda like a template name nobody really is named like that. “De tal” really means something like “from somewhere”.
We dont out it on the graves, but we use it as slang for situations where we need to refer to someone generic like “imagine a fulano de tal doing xxxxxxxxxxx”.
There are other names like Zutano, Mengano, etc.
Edit: My mom sometimes uses “Miguel Perez”. Those 2 are very common first and last names.
In Brazil (Portuguese speaking) we also use Fulano de tal. I didn’t know it was used in other countries!
We also “José Ninguém” and “Maria Ninguém” to mean someone who’s a nobody. It literally means Joseph/Mary (very common names in Brazil) Nobody.
There’s also a name that expresses the same feeling of ‘Joe Schmoe’ in pt-br: ‘Zé Roela’
And to expand on Fulano’s family, we must not forget Beltrano and Ciclano.
And “Zé das Couves” (but this one is used more rarely).
Does this came from arabic influence?
To refer someone without a name or generic name we sometime say Fulan bin Fulan meaning someone the son of someone
A lot of Spanish words and culture come from Arabic influences, the iberic peninsula was under control of arabs on the VIII century.
There’s something similar in Italian, Tal dei Tali. Literally something like that one of those ones