An agathodaemon or agathodaimon was a spirit of vineyards and grainfields in the religion of the ancient Greeks.
Agathodaemon or Agathodaimon may also refer to Set (deity), the Egyptian god The Canopic Branch of the Nile Delta, called the Agathodaemon or Agathodaimon in Ptolemy's Geography Agathodaemon (alchemist), the 3rd-century Egyptian alchemist Agathodaemon of Alexandria, an Egyptian cartographer of uncertain date connected with Ptolemy's Geography Agathodaemon, a Martian canal named for the cartographer Agathodaemon (grammarian), the 5th-century Egyptian grammarian Agathodaimon (band), a German band playing death metal Agathos Daimon (boxer), who died in ancient Olympia aged 35 having promised Zeus victory or death Valles Marineris, a 4000-kilometre long canyon system on Mars, was named "Agathodaemon" in the old canal maps