The word vader is Dutch for 'father.'

This is pretty cool if you're a fan of the Star Wars trilogy. We're not going to say any more on this subject, just in case you're one of the 5 people who hasn't seen Star Wars. This fact probably has no significance to the plot whatsoever. But seriously, watch the movies already. It can only make your life better. Heck, you could even watch them with your vader.

(source)