If you mean the
word Nosferatu, I've found this little snippet of info:
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The word "vampire" comes from the Slavic word obyri or obiri, which evolved into the Bulgarian word "vampir". Although sources differ greatly, some say that the Greek word nosophoros (which means "plague-carrier") that evolved into the Old Slavonic word "nosufur-atu" is a synonym for the word "vampire". In our culture, the words "vampire" and "nosferatu" are interchanged often.
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Source:
http://www.pantheon.org/articles/v/vampire.html