Daemon (classical mythology) in the context of "Zelus"

Orcus was a god of the underworld, punisher of broken oaths in Etruscan and Roman mythology. As with Hades, the name of the god was also used for the underworld itself. Eventually, he was conflated with Dis Pater and Pluto.

A temple to Orcus may once have existed on the Palatine Hill in Rome. It is likely that he was transliterated from the Greek daemon Horkos, the personification of oaths and a son of Eris.
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The Minoan Genius is a legendary creature that was common in the Minoan art of the Bronze Age Minoan civilization in ancient Crete. It is portrayed sometimes with the head of a lion, or of a hippopotamus, or of other animals. It is mostly seen on Minoan seals, often in pairs as supporters of deities. It is also sometimes called a "demon", though it seems generally to be a benign figure in Minoan religion; the meaning is that of a daemon in later classical religions.

It is often portrayed with water vessels, such as ewers, so it seems to play a role as a libation bearer to deities.

In Greek mythology, Polemos /ˈpɒlɪˌmɒs/ or Polemus /ˈpɒlɪməs/ (Ancient Greek: Πόλεμος Pólemos; "war") was a daemon; a divine personification or embodiment of war. No cult practices or myths are known for him, and as an abstract representation he figures mainly in allegory and philosophical discourse. The Roman counterpart of this figure was Bellum.

Somnium (Latin for "The Dream") — full title: Somnium, seu opus posthumum De astronomia lunari — is a novel written in Latin in 1608 by Johannes Kepler. It was first published in 1634 by Kepler's son, Ludwig Kepler, several years after the death of his father. In the narrative, an Icelandic boy and his witch mother learn of an island named Levania (the Moon) from a daemon ("Levana" is the Hebrew word for the moon). Somnium presents a detailed imaginative description of how the Earth might look when viewed from the Moon, and is considered the first serious scientific treatise on lunar astronomy. Carl Sagan and Isaac Asimov have referred to it as one of the earliest works of science fiction.

Ceuthonymus or Keuthonymos (Ancient Greek: Κευθώνυμος) is a spirit in Greek mythology who is the father of Menoites (or Menoetes, Menoetius). Ceuthonymus is a mysterious daimon or spirit of the underworld, who lives in the realm of Hades.

The Apology of Socrates (Ancient Greek: Ἀπολογία Σωκράτους, Apología Sokrátous; Latin: Apologia Socratis), written by Plato, is a Socratic dialogue of the speech of legal self-defence which Socrates (469–399 BC) spoke at his trial for impiety and corruption in 399 BC.

Specifically, the Apology of Socrates is a defence against the charges of "corrupting the youth" and "not believing in the gods in whom the city believes, but in other daimonia that are novel" to Athens (24b).