Duma(h) or Douma (Aramaic) is the angel of silence and of the stillness of death.
Dumah is also the tutelary angel of Egypt, prince of Hell, and angel of vindication. The Zohar speaks of him as having "tens of thousands of angels of destruction" under him, and as being "Chief of demons in Gehinnom [i.e., Hell] with 12,000 myriads of attendants, all charged with the punishment of the souls of sinners." As the patron of Egypt, he disregarded the command of God to exercise judgment over the Egyptian deities. Whereupon God banishes him into Gehenna, there he becomes it's ruler and three angels of destruction are appointed to him. He and his fellow angels torment the sinners every day in the week except on Sabbath.
In the video game Legacy of Kain: Soul Reaver, Dumah is the name of a boss character. He is the vampire brother of Raziel, and along with Turel is the one who cast him into the Abyss on Kain's orders. In reference to the meaning of his name, when finally confronted, he has been killed by vampire hunters, and his corpse is sitting silently on a throne.
Doma (a variation of Dumah) the Angel of Silence is a card in the card game Yu-Gi-Oh!.
Dumah makes an appearance in Neil Gaiman'sThe Sandman (DC Comics), specifically in "The Season of Mists". He, along with Ramiel, become the keepers of Hell after Lucifer abandons his throne.
Dumat, the Dragon of Silence in the Dragon Age series of video games, is named after this angel. Within the series' backstory, he was the first of the Old Gods to become an archdemon, necessitating the creation of the Grey Wardens (the series' primary protagonists) to stop him, some 1,200 years before the series begins.
In the video game Fire Emblem Gaiden and its remake Fire Emblem Echoes: Shadows of Valentia, Duma is the final boss of the story. He believes that humanity is weak and that hardship makes them strong. He is the patron deity of Rigel and is worshiped as the War Father, but becomes denounced as a Fell God by some of the characters because of his descent into madness. In his corruption, he takes the form of a large one-eyed green dragon.