Sikon writes:

As a Russian myself, I'd like to note that Russians have three names: given name, patronymic (which is based on the father's name), and family name. In the Soviet times, some people had double family names (separated with a hyphen), but this practice is obsolete now.

There can't be more than three names, and Russians don't have multiple middle names like in English-speaking countries (honestly, I have no idea how middle names work).

Also, the last name has two different forms depending on the gender; since Dr. Smith is female, she should be Hvorostovskaya, not Hvorostovsky*. And some of the names (like Sonyechka Marinochka) are dimunitive forms, which are never used in formal writing.

I understand, though, that you probably know all this and just used an overly long name for comedic effect. :)

* This one I fixed in the comic.