Phrearrhii
Phrearrhii or Phrearrhioi or Phrearroi was a deme of the coastal region of ancient Attica, belonging to the Leontis tribe, with nine to ten representatives in the Boule.
It was situated roughly 30 km south-east of Athens, bordering the deme of Anaphlystos to the south-west, just north of Attic Olympus, close to modern Pheriza, in the Lavreotiki municipality.
The Athenian statesman Themistocles was a native of Phrearrhioi.
Its site is located east of modern Olymbos.