Yes
Yes, Jeff Bezos is still alive
No, Jeff Goldblum is still alive.
Yes.
As of December 2013, LeVar Burton is still alive.
Tim Burton is still alive
No-but his underpants are
Yes.
Yes, he's still very much alive and directing movies.
No, he's still alive........
NO still alive...read much?
Jeff the Killer was just a made up story on creepy pasta. If you're asking if the story is still alive, then yes, people still talk about Jeff on occasions.
Yes.