What was the Egyptian god of the underworld?

Previous answer: "Hades he rules the Underworld if anyone is the Greek God of Darkness it is him."

My answer: I actually think its Erebus, or Erebos to others. Throughout the Greek tales, he has been referred to as Hades and Tartarus, though all 3 are different gods. He is the personification of shadow and darkness itself. He is also the son of Chaos. His sister is Nyx, goddess of night, who is also his wife.