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.
We also have the slur of “sjonnie en anita” when talking about lower class, anti social people, “sjonnie” being the man and “anita” the woman. Both are very common names in older generations, less common in younger generations.
Would Jan Lul be relevant to this discussion?