• Phrynichus, a genus in the Amblypygi, an order of arachnids

People

• There are two dramatic poets named Phrynicus whose plays only survive in fragments:
  • Phrynichus (tragic poet), a pioneer of Greek tragedy, most famous for The Fall of Miletus
  • Phrynichus (comic poet), a writer of old Attic comedy who flourished in the late 5th century BC
• Phrynicus, an Athenian general during the Peloponnesian War
  Peloponnesian War
  The Peloponnesian War, 431 to 404 BC, was an ancient Greek war fought by Athens and its empire against the Peloponnesian League led by Sparta. Historians have traditionally divided the war into three phases...
  
  . He took a leading part in establishing the oligarchy of the Four Hundred at Athens in 411 BC and was assassinated in the same year
• Phrynichus Arabius
  Phrynichus Arabius
  Phrynichus Arabius or Phrynichus of Bithynia was a Greek grammarian who flourished in 2nd century Bithynia, writing works on proper Attic usage...
  
  , a grammarian and rhetorician of the 2nd century AD