Osiris Osiris (Greek language, also Usiris; the Egyptian language name is variously transliterated Asar, Aser, Ausar, Ausir, Wesir, Usir, Usire,or Ausare) was an Egyptian god, usually called the god of the Afterlife.Osiris is one of the oldest gods for whom records have been found; one of the oldest known attestations of his name is on the Palermo Stone of around 2500 BC.