From how I was told: Vlad Tepish did all of the impaling, and was well loved (but feared) because of it. Did wierd things like impaling birds and drinking their blood. Anyway, he was eventually called "Dracul" (menaing "The Dragon") which was a respectful name.
His son had no skin pigment, and was refferred to as "Dracula" ("Son of the Dragon")
At least that's what I was told.