Quote Originally Posted by enge
PS: "Виноградков" - impossible, because there wasn`t firstname or sobriquet, or geographical name.
Some villagers say "виноградка" instead of "виноградинка" (a grape). I think it's within the realm of possibility, that Виноградков can stem from this. Moreover, Виноградкин does exist (same roots), so why not Виноградков?

I'm not trying to prove that this is a common name or anything (it will be rare for sure), but it's linguistically and historically possible.