Encyclopædia Britannica, Ninth Edition/Demetrius

In the 9th edition of the Encyclopædia Britannica, Demetrius may refer to:

• Demetrius I. Poliorcetes, king of Macedonia,
• Demetrius II., king of Macedonia,
• Demetrius I. Soter, king of Hellenic Syria,
• Demetrius II. Nicator, king of Hellenic Syria,
• Demetrius III. Eucerus, king of Hellenic Syria,
• Demetrius Phalereus, a Peripatetic philosopher,
• Demetrius, a Cynic philosopher, or
• Demetrius, a Russian pretender.