In Swedish, a pencil is called a "blyertspenna". "Bly" means "lead", "penna" means "something you write with" and "-erts" means nothing, as far as I know. But this means that Swedes call a pencil a "lead-erts pen", suggesting, like Marcus said, that it contains lead. It clearly doesn't, and we Swedes ought to shape up and call this writing tool a "grafitpenna", a graphite pen.
No lead here!
Ann