Tetrarch
# Tetrarch

Tetrarch, Tetrarchs, or Tetrarchy may refer to:

* Tetrarchy, the four co-emperors of the Roman Empire instituted by the Emperor Diocletian
* Portrait of the Four Tetrarchs - a sculpture of the four co-emperors of the Roman Empire
* Herodian Tetrarchy, formed by the sons of Herod the Great
* Tetrarch, Military rank in ancient Greek armies
* Tetrarch (novel), a 2003 novel by Ian Irvine
* Light Tank Mk VII Tetrarch, a British light tank of World War II
* The Tetrarch, a Thoroughbred racehorse
* The Tetrarchs of Ancient Thessaly under Philip II of Macedon
* The Tetrarchs of Galatia in Asia Minor
* Tetrarches, a rank in the Byzantine army
* Tetrarch, a 1981 fantasy novel by Alex Comfort
* Tetrarch (band), a nu metal band from Atlanta, Georgia
* Tetrarchy, a subdivision of the Royal Phalanx in 19th-century Greece
* HMS Tetrarch is the name of the two vessels that have served in the Royal Navy
