Demetrius, also spelled as Demetrios, Dimitrios, Demitri, and Dimitri (from Greek — Δημήτριος, Demetrios pertaining to Demeter), is a male given name.

Demetrius and its variations may refer to the following:

  • Demetrius of Phalerum (c 350-280 BCE)
  • Demetrius I of Macedon (337–283 BCE), called Poliorcetes, son of Antigonus I Monophthalmus, King of Macedonia 294–288 BCE
  • Demetrius II Aetolicus, son of Antigonus II, King of Macedonia 239–229 BCE
  • Demetrius, son of Philip V of Macedon
  • Demetrius II Nicator (d. 125 BCE), son of Demetrius I Soter
  • Demetrius III, Indo-Greek king c. 100 BCE
  • Demetrius III Eucaerus (d. 88 BCE), son of Antiochus VIII Grypus, Seleucid King
  • Demetrius of Thessaloniki (d. 306), Christian martyr and saint
  • Demetrius Zvonimir (died 1089), King of Croatia 1075-1089
  • Demetrius, a main character in William Shakespeare's play, A Midsummer Night's Dream
  • Demetrius, a Greek slave in the Lloyd C. Douglas Christian novel The Robe and its film sequel below
  • Demetrius and the Gladiators, a 1954 20th Century Fox film
  • Demetri, a fictional character in the Twilight fantasy series
  • Demetri Martin, American comedian
  • Demitri Maximoff, a vampire from the Capcom video game series Darkstalkers
  • Demetri McCamey, American basketball player
  • Dimitrij, an opera by Antonín Dvořák
  • Dmitry Medvedev, Prime Minister of Russia
  • Dmitri Mendeleev Russian chemist, creator of the first periodic table
  • Dimitri Petrenko, a character in the first-person shooter Call of Duty: World at War
  • Dmitri Shostakovich Russian composer

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