That does look interesting.
One more note on the names in "Friends," from a creative writing perspective. One way to make a sympathetic character is to make that character someone that the reader can identify with. More generic names make it more likely that people will be able to identify. I see "Ross" and "Monica" as being fairly generic in that way -- I think they were supposed to be the center of the show.
This makes sense in terms of the structure of the show. Ross and Monica connect the two groups of three; Monica, Phoebe, and Rachel live in one apartment (though I don't remember if they all lived there at the same time or if Phoebe moved out before Rachel moved in), while Ross, Joey and Chandler live across the hall. Ross and Monica are siblings and so connect the two groups.
Everyone else is more or less in sidekick territory. Ross (normal guy) has the sidekicks Joey (super-hunky Italian guy) and Chandler (super-geeky WASPy guy). Monica (normal gal) has the sidekicks Phoebe (super-dizzy blonde chick) and Rachel (super-spoiled Jewish chick).
The sidekick names are all less generic, meant to convey something about their characters.
Note -- this is in terms of the first season or so, when the names were bestowed. The characters evolved over the course of the show.