Hades is the judge of the Underworld.
There were three judges of the underworld : Rhadamanthus, Minors, ands Aeacus.
King Minos, Aeacus, and Rhadhamanthus
He is god of the underworld or hell who only judges the male sinners.
Anubis was the god of embalming and mummification; Osiris judges the dead and lives in the underworld.
The three main judges were Rhadamanthys, Minos, and Aeacus. Some myths believe there was a fourth, know as Triptolemos.
In the Epic of Gilgamesh, the seven judges of the underworld are described as Annunitum, Belit-Sheri, Kulla, Misharu, Nungal, Nirah, and Ninkigal. These deities judge the souls of the dead and determine their fates in the afterlife.
Hades' realm or the Land of the Dead, was the underworld. It has many sections. There are the rivers of Styx, Acheron, Lethe, Phlegethon, and Cocytus. Around them is Oceanus, which is the river that encircles the world. The judges decide where the soul is to go: to Elysium, the Fields of Asphodel, or Tartarus.
The Judges of the Dead answered to him, so too did the Furies and the Dream gods who dwelt in the Underworld; foes were most well known as the Titans whom he and his siblings defeated.
Hades' Underworld is called The Underworld.
the underworld
The Underworld is in the Underworld. It is a different realm of existence, not part of this earth.